The document discusses a seminar on fungicide tolerance in Trichoderma spp. and Pseudomonas fluorescens. It provides an introduction to biocontrol agents and their drawbacks. Case studies are presented evaluating the effect of various fungicides on the growth of Trichoderma and Pseudomonas in vitro. The studies found that some fungicides like mancozeb, copper oxychloride and metalaxyl were compatible with the biocontrol agents even at high concentrations, whereas others like carbendazim and thiophanate methyl strongly inhibited their growth. The conclusion is that integrating compatible biocontrol agents and fungicides can provide effective disease management while reducing pesticide usage and resistance development in pathogens.
"In field molecular diagnostics as an aid to disease management"EMPHASIS PROJECT
Insights about isothermal Polymerase Chain Reaction (PCR) assays and how they can be used to diagnose the presence of latent diseases in the field, including those which are especially difficult to identify. They will show how assays are developed, and how they may be used to improve disease management choices.
The target audience are researchers, agri-business and forestry experts, farmers and foresters and any other interested in plant health.
Do not hesitate to contact EMPHASIS project through Facebook, Twitter, email (emphasisproject@gmail.com) or through their website (http://www.emphasisproject.eu/) if you want to be updated on webinars dates and content and book a ticket.
To watch on Youtube: https://youtu.be/yFEG9uTEhdc
the presentation is about microbial endophytes, discovery of endophytes, their types, isolation methods of different types and identification and the useful impacts of them to the plant ecology.
PRESENT STATUS AND PROSPECT OF BOTANICALS IN PLANT DISEASE CONTROLSamar Biswas
Botanicals have been in use for a long time for pest control. A product of species coevolution, these compounds offer many environmental advantages. However, their uses during the 20th century have been rather marginal compared with other bio control methods of pests and pathogens. Improvement in our understanding of plant allelochemical mechanisms of activity offer new prospects for using these substances in crop protection. We examine the reasons behind their limited use and the actual crop protection developments involving plant allelochemicals, namely formulations including bio pesticides of plant origin for organic or traditional agricultures, and improvement of plant resistance to pathogens through identification of genes coding for allelochemicals and stimulation of natural passive and active defenses of the plant. Commercial and regulatory aspects are discussed.
Biological control is the suppression of one organism by another. There are two modes of mechanisms namely direct and indirect. Here I focused on the direct mechanisms such as parasitism, predatism, antibiotic-mediated suppression, lytic enzymes and unregulated-waste products. with the help of these various direct mechanisms, the bio-control agents will compete the pathogen's activity.
"In field molecular diagnostics as an aid to disease management"EMPHASIS PROJECT
Insights about isothermal Polymerase Chain Reaction (PCR) assays and how they can be used to diagnose the presence of latent diseases in the field, including those which are especially difficult to identify. They will show how assays are developed, and how they may be used to improve disease management choices.
The target audience are researchers, agri-business and forestry experts, farmers and foresters and any other interested in plant health.
Do not hesitate to contact EMPHASIS project through Facebook, Twitter, email (emphasisproject@gmail.com) or through their website (http://www.emphasisproject.eu/) if you want to be updated on webinars dates and content and book a ticket.
To watch on Youtube: https://youtu.be/yFEG9uTEhdc
the presentation is about microbial endophytes, discovery of endophytes, their types, isolation methods of different types and identification and the useful impacts of them to the plant ecology.
PRESENT STATUS AND PROSPECT OF BOTANICALS IN PLANT DISEASE CONTROLSamar Biswas
Botanicals have been in use for a long time for pest control. A product of species coevolution, these compounds offer many environmental advantages. However, their uses during the 20th century have been rather marginal compared with other bio control methods of pests and pathogens. Improvement in our understanding of plant allelochemical mechanisms of activity offer new prospects for using these substances in crop protection. We examine the reasons behind their limited use and the actual crop protection developments involving plant allelochemicals, namely formulations including bio pesticides of plant origin for organic or traditional agricultures, and improvement of plant resistance to pathogens through identification of genes coding for allelochemicals and stimulation of natural passive and active defenses of the plant. Commercial and regulatory aspects are discussed.
Biological control is the suppression of one organism by another. There are two modes of mechanisms namely direct and indirect. Here I focused on the direct mechanisms such as parasitism, predatism, antibiotic-mediated suppression, lytic enzymes and unregulated-waste products. with the help of these various direct mechanisms, the bio-control agents will compete the pathogen's activity.
This presentation is to understand the concepts of endophytes that reside within plants & to explore the applications of endophytes for the management of plant diseases.
Information may be time-sensitive. Subscribers should use the information contained at their own risk. Please check latest information with Dr. A by emailing bugdoctor@auburn.edu.
Plant growth-promoting mechanisms of endophytesThe Tiny Domain
The global changes in climate and increasing population have unfortunate effects in food production and will become insufficient to feed the world. The green revolution could alleviate poor crop production by using high yielding varieties and use of chemical fertilizers and agrochemicals. But excessive use of chemical fertilizers and agrochemicals has resulted in the deterioration of soil fertility. Hence, agronomic practices are moving toward sustainable and environment friendly approach.
Entamopathogenic Fungi as Biocontrol Agents - A Special Focus on Beauveria ba...Vigneshwaran Vellingiri
This slide is about the entomopathogenic fungus which is a fungus that can act as a parasite of insects and kills or seriously disables them. Since they are considered natural mortality agents and environmentally safe, there is worldwide interest in the use and manipulation of entomopathogenic fungi for biological control of insects and other arthropod pests.
Biological control of the post harvest diseases of fruits.Dinithi De Silva
what is post harvest disease. Simply , Postharvest diseases are those that appear and develop after harvest. Here theses are some pictures of post harvest diseases.
Fig 01- cherry fruit rot caused by Alternaria sp.
Fig 02- mango stem end rots causative agent is Dotheiorella sp.
All postharvest diseases of fruit are caused by fungi and bacteria.
viral infections present before harvest can sometimes develop more rapidly after harvest. In general, however, viruses are not an important cause of postharvest disease. Postharvest diseases are often classified according to how infection is initiated. The so-called 'quiescent' or 'latent' infections are those where the pathogen initiates infection of the host at some point in time , but then enters a period of inactivity or dormancy until the physiological status of the host tissue changes in such a way that infection can proceed.
After The dramatic physiological changes like compositional changes physiological changes which occur during fruit ripening are often the trigger for reactivation of latent infections. It can be through direct penetration through skin, natural openings & injuries . injuries can be mechanical or caused by insects. Therefore, post harvest diseases can be arised during or after harvest.After harvest in the dramatically physiological changes like compositional changes physiological changes which occur during the fruit ripening of in triger for reactivation of the latent infection.
And also many of the physiological changes also triggers the reactivation of the latent infection mainly both the losses conditions can lead to the fungal infection because fungi are optimum at the dry conditions after that ethylene production fruit ripening cannot so it causes a lot of compositional changes in the sugar content and physiological changes in the fruit it soften the fruit covering and then it can be easily the damage so through the damage microorganisms can enter the fruits and grow inside and multiplication then causes postharvest diseases
This presentation is to understand the concepts of endophytes that reside within plants & to explore the applications of endophytes for the management of plant diseases.
Information may be time-sensitive. Subscribers should use the information contained at their own risk. Please check latest information with Dr. A by emailing bugdoctor@auburn.edu.
Plant growth-promoting mechanisms of endophytesThe Tiny Domain
The global changes in climate and increasing population have unfortunate effects in food production and will become insufficient to feed the world. The green revolution could alleviate poor crop production by using high yielding varieties and use of chemical fertilizers and agrochemicals. But excessive use of chemical fertilizers and agrochemicals has resulted in the deterioration of soil fertility. Hence, agronomic practices are moving toward sustainable and environment friendly approach.
Entamopathogenic Fungi as Biocontrol Agents - A Special Focus on Beauveria ba...Vigneshwaran Vellingiri
This slide is about the entomopathogenic fungus which is a fungus that can act as a parasite of insects and kills or seriously disables them. Since they are considered natural mortality agents and environmentally safe, there is worldwide interest in the use and manipulation of entomopathogenic fungi for biological control of insects and other arthropod pests.
Biological control of the post harvest diseases of fruits.Dinithi De Silva
what is post harvest disease. Simply , Postharvest diseases are those that appear and develop after harvest. Here theses are some pictures of post harvest diseases.
Fig 01- cherry fruit rot caused by Alternaria sp.
Fig 02- mango stem end rots causative agent is Dotheiorella sp.
All postharvest diseases of fruit are caused by fungi and bacteria.
viral infections present before harvest can sometimes develop more rapidly after harvest. In general, however, viruses are not an important cause of postharvest disease. Postharvest diseases are often classified according to how infection is initiated. The so-called 'quiescent' or 'latent' infections are those where the pathogen initiates infection of the host at some point in time , but then enters a period of inactivity or dormancy until the physiological status of the host tissue changes in such a way that infection can proceed.
After The dramatic physiological changes like compositional changes physiological changes which occur during fruit ripening are often the trigger for reactivation of latent infections. It can be through direct penetration through skin, natural openings & injuries . injuries can be mechanical or caused by insects. Therefore, post harvest diseases can be arised during or after harvest.After harvest in the dramatically physiological changes like compositional changes physiological changes which occur during the fruit ripening of in triger for reactivation of the latent infection.
And also many of the physiological changes also triggers the reactivation of the latent infection mainly both the losses conditions can lead to the fungal infection because fungi are optimum at the dry conditions after that ethylene production fruit ripening cannot so it causes a lot of compositional changes in the sugar content and physiological changes in the fruit it soften the fruit covering and then it can be easily the damage so through the damage microorganisms can enter the fruits and grow inside and multiplication then causes postharvest diseases
— The damping off disease of tobacco seedlings caused by the pathogen Rhizoctonia solani causes a huge damage. The limited numbers of products are used in protection from the disease, but lately new fungicides appeared on the market. The aim of these investigations was to determine the effectiveness of new fungicides in control of this pathogen, compared with commonly used. The tests were carried out in conditions in vitro, with 8 fungicides. Two fungicides were evaluated in 2 or 3 concentrations. All tested fungicides showed extremely high effectiveness in the control of this pathogenic fungus –the percentage of inhibition of radial growth ranges from 80, 45 to 100%. The preparate Orvego (300 g / l ametoctradin + 225 g / l dimetomorph) is exception –it showed 48.05%. The best effectiveness showed contact fungicides Manfil 80WP (800 g/kg mancozeb) and Enervin WG (120 g/kg ametotradin +440 g/kg metiram) as well as systemic Signum 33 WG (267 g/kg boscalid +67g/kg pyraclostrobin) and Quadris 25 SC (250 g/l azoxystrobin)with100%inhibition of pathogenʼs development. Fungicides with such high effectiveness in control of R.solani will ensure their use in protection of tobacco seedling from the damping off disease.
Antibacterial Effect of Endophytic Actinomycetes from Marine Algae against Multi Drug Resistant Gram Negative Bacteria by Manoharan N in Examines in Marine Biology & Oceanography
In this slide different fungi are Mentioned and their role as bio-control agents is also elaborated which is reviewed from different research articles cited in reference portion.
Relative toxicity of selected insecticides against adult whitefly, t. vaporar...Sachin U.S
The present experiment was conducted to assess relative toxicity of selected insecticides against whitefly in the Entomology laboratory at College of Horticulture, Mudigere during the year 2014-2015. Among the eleven treatments, imidachloprid, thiamethoxam and cyantraniliprole were highly toxic to adults which recorded 100 per cent mortality, four days after treatment. Cyantraniliprole recorded the highest adult mortality comparatively early than imidachloprid and thiamethoxam. Fipronil 80% WG, recorded 100 percent mortality five days after treatment which was followed by emamectin benzoate 5% SG at sixth day after treatment and recorded as next best treatments under laboratory condition against whitefly. Acephate 75% SP and azadirhactin 10000 ppm recorded highest level of mortality (100%) at seventh and eighth day after treatment, respectively which was followed by triazophos 40% EC, spinosad 480% SC and buprofezin 25% SC at eleventh day after treatment. Considering the result, cyantraniliprole, thiamethoxam and imidacloprid were recommended for effective control of sucking pests in cotton ecosystem.
Synergistic effects of 18 flavonoids (11 glycosides and flavones, 01 flavones diglycoside, 04 chalcones and 02 aglycones) in combination with different anti-fungal agents against fungal strains were investigated. The agar diffusion assay of these flavonoids with different anti-fungal agents was tested. The Minimum Inhibitory Concentration (MIC) values of each of the flavonoids with different anti-fungal agents were determined by using checkerboard broth micro dilution assay. Flavones diglycoside (3, 5-dihydroxy flavones 7-O-b-D-glucuronide-4-O-b-D-glucopyranside) potentiated the in vitro and in vivo activity against fungal strains. The flavones diglycoside reduced MIC of amphotericin-B to one half against different fungal strains, Candida albicans, Candida krusei, Candida parapsilosis, Candida tropicalis and Cryptococcus neoformans 1202. Although moderate change between in vitro and in vivo studies have been found, the elucidation of the mechanisms involved in flavonoid action will have many health benefits to man. In conclusion, these findings suggested that flavonoid combination regimens may be considered as an useful candidate for the treatment of fungal infection.
ABSTRACT- Tobacco caterpillar, Spodoptera litura (Fabricius) is a widely distributed pest in South-East Asia, feeding on 63 plant species belonging to 22 families. It is a serious pest of soybean, pulses oilseeds, cotton and vegetables. In an outbreak phase, this insect can completely defoliate large area of crops causing reduction in yield. Heavy use of synthetic organic insecticides to control this pest resulted in the development of resistance against insecticides of different groups. Although a variety of agrochemicals are used for growing crops, little is known about their direct or indirect effects on nontarget organisms including insect pests. Therefore, alternative control measures have been searched out for this noxious pest. By adopting probable and advanced management practices this important pest can be managed. Key-words- Spodoptera litura, Bioassay, agrochemicals, Growth and development, Polyphagous pest
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Fungicides Tolerance in Trichoderma spp. and Pseudomonas fluorescens
1.
2. SEMINAR ON
Fungicides Tolerance in Trichoderma spp. and Pseudomonas fluorescens
Pansuriya Bhavin J.
M.Sc. (Agri.) Plant Pathology,
C. P. College of Agriculture., S.D.A.U.,
Sardarkrushinagar.
Reg. No.:04-AGRMA-02244-2020
S P E A K E R
Dr. N. R. Patel
Associate Research Scientist
( Pl. Path.),
Seed Spices Research Station.
S.D.A.U., Jagudan.
M A J O R A D V I S O R
Dr. P. S. Patel
Associate Professor,
Department of Entomology,
C. P. College of Agriculture,
S.D.A.U., Sardarkrushinagar.
M I N O R A D V I S O R
3. SEMINAR OUTLINE
1
Bio Control Agents
Drawback of bio agents & its
solution
3
2
5
4
Conclusion
Introduction
Case studies
4. Introduction
The Green Revolution in India (1960) refers to a period when
Indian agriculture was converted into an industrial system due to
the adoption of modern methods and technology such as the use
of high yielding variety (HYV) seeds, irrigation facilities,
pesticides and fertilizers.
Generally, hybrid and high yielding varieties are more susceptible
to disease than wild varieties.
In order to protect crops from different types of diseases caused
by microorganisms, the farmers used pesticides at a high amount.
1
5. The widespread use of pesticides has resulted in resurgence
of pests, environmental pollution, development of resistant
strains, etc.
The usage of a high quantity of fungicides and insecticides
incorporated toxicity in the plants.
Eventually, The benefits of the Green Revolution have been
coupled with unanticipated harmful consequences from
chemical pollution.
2
6. Pesticides are necessary at present but are not a long term
solution to crop, human and animal health.
Besides their non-target effects and hazardous nature, they are
becoming more expensive and some are loosing their
effectiveness because of development of resistant strains.
According to WHO estimate (2012) approximately one million
people are taken ill every year with pesticide poisoning and up
to 20,000 of those die in agony.
Source : SNApplied Sciences, 2019, 1:1446
Evils of Pesticides
3
7. Four decades after Indian farmers began increasing production
using pesticides and fertilizers, they are starting to have second
thoughts about the change.
In 2008, Researchers at Punjab University discovered DNA
damage in 30 percent of Indian farmers who treated plants with
herbicides and pesticides.
An additional study found heavy metals and pesticide chemicals in
all products including drinking water. These substances are
harmful and can cause serious health problems.
Some of these problems may occur because some farmers may not
know how to handle and dispose of toxic chemicals. They may
also harm the environment by using too many of those products.
Source : Lee, Kevin(2018) Harmful Effects of the Green Revolution" @ sciencing.com 4
8. Due to hazardous effects of chemical pesticides, biological
management of disease is getting more important than
chemical methods.
Bio-agents reduce excessive use and misuse of synthetic
fungicide and development of fungicide resistance in pathogens
(Kumar et al., 2017).
Currently several bio control agents are recognized and available
as following : Trichoderma, Gliocladium and Ampelomyces
(fungal bio agents) & Pseudomonas, Bacillus, Agrobacterinum
(Bacterial bio agents).
Among them Trichoderma & Pseudomonas spp. are most
commonly used as widely available in market.
5
9. Trichoderma spp.
It is free living, Ubiquitous, Non polluting, Non
phytotoxic, easily accessible and highly
proliferating fungi.
Trichoderma spp. are abundantly present in the
soil, rhizosphere and are mycoparasitic of several
soil-borne plant pathogens.
Several species of Trichoderma produce volatile
and non-volatile antibiotics and enzymes which are
antagonistic to phytopathogenic fungi and
nematodes.
6
10. The fungus is effective against pathogens causing
various diseases of the root region of plants viz., collar
rot, foot rot, damping off etc.
In the rhizosphere, some strains of Trichoderma spp.
release metabolites which improve the growth of
seedling and it also causes resistance against abiotic
stress.
Trichoderma spp. have great potential against soil-
borne pathogens and it may be able to replace
chemical pesticides in near future (Manish and
Shabbir, 2017).
7
11. Pseudomonas fluorescens
Pseudomonas fluorescens are important group
of bacteria that play major role in the induced
systemic resistance, biological control of plant
pathogens and plant growth promotion etc.
It encompasses a group of common,
nonpathogenic saprophytes that colonize soil,
water and plant surface environments.
It is rod shaped bacteria have multiple polar
flagella.
8
12. Growth rapidly in vitro and to be mass produced.
Rapidly utilize seed and root exudates and colonizes
and multiplies in the rhizosphere and spermosphere
environment and in the interior of the plant .
Produce a wide spectrum of bioactive metabolites.
Compete aggressively with other microorganisms.
Adapt to environmental stresses.
Pseudomonas fluorescens as bio control agent
Electron Microscopic view
9
13. Induced systemic resistance of the host plant
Plant Growth promotion
Competition
Antibiosis
Mycoparasitism
Mode of action
10
15. Depend on
environment conditions
Draw back of
bio agents
Lack of availability and
awareness
Used against specific
diseases
Slow and Less effective
than chemicals
Short shelf life
Only a preventive
measure 12
16. Bio control agents can not manage the disease completely when
large scale infection is already established in the field, farmers
favoured fungicides for managing the crop diseases.
Indiscriminate use of pesticides has resulted in accumulation of toxic
compounds which affects adversely to humans health and
environment.
Only application of bio-agent is not the answer for management of
plant diseases.
From the above conclusion, only chemicals or only bio-agents can
not give long term solution of plant disease management.
13
17. Integration of bio-agents with fungicides may enhance the
effectiveness of disease control and provide better management of
soil borne diseases (Papavizas and Lewis, 1981).
To develop an effective disease management programme,
knowledge about the compatibility of potential bio-agents with
commonly used agrochemicals are essential.
As fungicides should have inhibitory effect on the pathogen but
should not have deleterious effect on the antagonists.
An understanding of the effect of fungicides on the pathogen and
the antagonists would provide information for the selection of
fungicides through compatibility studies in vitro.
14
So, What is the solution?
18. Combining antagonists with synthetic chemicals eliminates the
chance of resistance development and reduces the fungicide
application ( Wedajo, 2015).
In several disease management strategies, the addition of
fungicide at reduced rates in combination with bio-control
agents has significantly enhanced disease control, compared to
treatments with only bio-control agents (Kumar et al., 2017).
In addition, this strategy may display even better control of
resistant strains of fungal pathogens and may help the
commercial growers to reduce the amount of fungicide use, thus
lowering the amount of chemical residue in the marketed
products (Nandini et al., 2018).
15
19. Benefits of compatibility
Eliminates the chance of
resistance development
Reduce cost of the
formulations
Can control more than
one disease at same time
Enhance the effectiveness
of disease control program
Provide better disease
suppression of pathogen as
compare to sole fungicides
Reduce the amount of fungicide
use and chemical residue
16
22. Table 1: Effect of fungicides on mycelial growth of Trichoderma asperellum
Kerala Kumar et al., (2017)
18
Sr. No. Fungicides
Mycelial inhibition (%) at
100 ppm 200 ppm 400 ppm 800 ppm
1 Metalaxyl M-8% + Mancozeb 64% 0.00 l 1.80 j 16.40 ij 26.10 ij
2 Carbendazim 12% + Mancozeb 63% WP 100a 100 a 100 a 100 a
3 Carbendazim 50% WP 100a 100 a 100 a 100 a
4 Mancozeb 50% + Carbendazim 25% WS 94.40 b 100a 100 a 100 a
5 Mancozeb 75% WP 23.30 j 28.05 i 39.10 h 52.70 fg
6 Metalaxyl 35% WS 17.20 k 41.10 h 76.30 d 88.80 c
7 Chlorothalonil 75% WP 48.80g 54.40f 62.50e 72.50d
8 Propiconazole 25% EC 100a 100 a 100 a 100 a
9 Zineb 68% + Hexaconazole 4% WP 76.4 d 88.8 c 100a 100 a
17
23. Sr.
No.
Systemic fungicides
Mycelial inhibition (%) Compatible/
Non -
compatible
250 ppm 500 ppm 750 ppm 1000 ppm
1 Azoxystrobin 23% W/W 0.00 0.00 0.00 0.00 C
2 Carbendazim 50% WP 100.00 100.00 100.00 100.00 N
3 Tricyclozole 75% WP 0.00 0.00 0.00 0.00 C
4 Hexaconazole 5% EC 60.95 100.00 100.00 100.00 N
5 Thiophenate Methyl 70% WP 63.46 100.00 100.00 100.00 N
6 Metalaxyl 35% WS 0.00 0.00 0.00 10.58 C
7 Propiconazole 25% EC 100.00 100.00 100.00 100.00 N
CD 1.601 4.362 4.362 2.33
SE(m) 0.539 1.468 1.468 0.784
CV 3.286 6.975 6.887 3.45
Table 2a: Effect of systemic fungicides on the mycelial growth of T. harzianum.
Karnataka, India Sonavane and Venkataravanappa (2017)
18
24. Sr.No.
Chemical name
Concentration (ppm)
Mycelial inhibition (%)
Compatible/
Non
compatible
1000 1500 2000
1 Mancozeb 75WP 0.00 (0.00) 5.88 (11.36) 7.76 (16.02) C
2 Chlorothalonil 75WP 86.27 (68.32) 87.15 (69.00) 85.56 (67.86) N
3 Dinocap 48 EC 21.56 (27.57) 36.02 (36.86) 36.19 (36.97) C
4 Sulphur 80WDG 0.00 (0.00) 0.00 (0.00) 7.76 (16.02) C
5 Copper oxychloride 50WP 0.00 (0.00) 13.72 (21.70) 21.56 (27.57) C
CD 2.686 8.946 15.099
SE(d) 1.256 4.184 7.062
SE(m) 0.888 2.958 4.993
CV 12.838 35.916 44.088
Table 2b: Effect of contact fungicides on the mycelial growth of T. harzianum.
Karnataka, India 19 Sonavane and Venkataravanappa (2017)
28. Treatment Concentration(ppm) Radial growth of Th-8 isolate
(mm)
Inhibition over control
(%)
Thiram
250 39.33 56.29 (48.59)
500 25.67 71.48 (57.49)
1000 17.67 80.37 (63.67)
Copper oxychloride
250 89.00 1.11 (6.09)
500 87.50 2.77 (11.85)
1000 82.33 8.52 (16.94)
Mancozeb
250 88.33 1.86 (6.35)
500 85.50 5.00 (12.89)
1000 78.33 12.97 (21.24)
Metalaxyl
250 89.33 0.75 (4.02)
500 87.66 2.60 (8.63)
1000 84.0 6.67 (14.91)
Control 90.0 0.00 (0.00)
C.D. (P<0.5) 2.04 (1.62)
SE(m)± 0.71 (0.42)
Table 5: Evaluation of some commonly used fungicides for their compatibility with Trichoderma
harzianum in vitro
Maurya et al., (2020)
Bihar, India 23
29. Bihar, India
Fig. 2: Mycelial growth of Trichoderma harzianum at different concentration with different fungicides
24 Maurya et al., (2020)
30. Sr. No. Fungicides
Inhibition per cent #
Mean
Concentrations (ppm)
500 1000 1500 2000
1. Captan 50% WP 51.10 (45.65)* 75.92 (60.64) 86.66 (68.61) 93.70 (75.50) 76.85
2. Copper hydroxide 53.8% W/W 0.74 (4.94) 5.92 (14.1) 7.96 (16.40) 12.59 (20.79) 6.80
3. Copper oxychloride 50% WP 0.00 (0.00) 4.81 (12.68) 11.48 (19.82) 18.89 (25.77) 8.80
4. Mancozeb 80% WP 0.00 (0.00) 4.81 (12.68) 10.74 (19.14) 12.59 (20.79) 7.04
5. Propineb 70% WP 11.48 (19.81) 21.11 (27.37) 33.33 (35.28) 50.74 (45.45) 29.17
6. Control 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00
S.Em± CD at 1%
Fungicides (F) 0.32 1.19
Concentrations (C) 0.26 0.98
F X C 0.65 2.39
Table 6a: In vitro evaluation of contact fungicides on the growth of Trichoderma asperellum
Karnataka, India Maheshwary et al., (2020)
25
31. Sr. No. Fungicides
Inhibition per cent #
Mean
Concentrations (ppm)
5 25 50 100
1. Azoxystrobin 25% SC 10.37 (18.79) 17.77 (24.94) 22.96 (28.64) 38.14 (38.16) 22.31
2. Metalaxyl 35% WS 0.00 (0.00)* 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00
3. Tebuconazole 25.9% EC 100 (90.05) 100 (90.05) 100 (90.05) 100 (90.05) 100
4. Propiconazole 25% EC 100 (90.05) 100 (90.05) 100 (90.05) 100 (90.05) 100
5. Carbendazim 50% WP 100 (90.05) 100 (90.05) 100 (90.05) 100 (90.05) 100
6. Control 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00
S.Em± CD at 1%
Fungicides (F) 0.08 0.31
Concentrations (C) 0.07 0.25
F X C 0.16 0.61
Table 6b: In vitro evaluation of systemic fungicides on the growth of Trichoderma asperellum
Maheshwary et al., (2020)
Karnataka, India 26
32. Sr. No. Fungicides
Inhibition per cent #
Mean
Concentrations (ppm)
1000 1500 2000 2500
1 Tebuconazole 50% + Trifloxystrobin 25% WG 100 (90.05) 100 (90.05) 100 (90.05) 100 (90.05) 100
2 Azoxystrobin 18.2% +Difenoconazole 11.4% SC 100 (90.05) 100 (90.05) 100 (90.05) 100 (90.05) 100
3 Metalaxyl-M 4% + Mancozeb 64% WP 0.00 (0.00)* 0.00 (0.00) 0.00 (0.00) 12.03 (20.31) 3.01
4 Carbendazim12% + Mancozeb 63% WP 100 (90.05) 100 (90.05) 100 (90.05) 100 (90.05) 100
5 Control 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00 (0.00) 0.00
S.Em± CD at 1%
Fungicides (F) 0.09 0.34
Concentrations (C) 0.08 0.31
F X C 0.18 0.69
Table 6c: In vitro evaluation of combination fungicides on the growth of Trichoderma asperellum
Maheshwary et al., (2020)
Karnataka, India 27
33. Sr.
No.
Fungicides Concentration (%)
Growth of Mycelium
(mm)
Per cent decrease over
control
Per cent
compatibility
1. Carbendazim
0.10 35.00 d 61.11 38.89
0.20 23.00 f 74.44 25.56
0.30 14.00 g 84.44 15.56
2. Copper oxychloride
0.20 49.00 b 45.55 54.45
0.30 28.00 e 68.88 31.12
0.40 17.00 g 81.11 18.89
3. Thiophanate methyl
0.05 16.00 g 82.22 17.78
0.10 15.00 g 83.33 16.67
0.20 14.00 g 84.44 15.56
4. Benomyl
0.05 10.00 h 88.88 11.12
0.10 9.00 h 90.00 10.00
0.20 8.00 h 91.11 8.89
5. Sodium hypochlorite
5.00 40.00 c 55.55 44.45
10.00 38.00 cd 57.77 42.23
15.00 23.00 f 74.44 25.56
6. Control - 90.00 a - -
Table 7: Effect of different fungicides on the radial mycelial growth of Trichoderma viride
Tamil Nadu, India Karpagavalli et al., (2020)
28
38. Sr.
No.
Fungicides
Dose
g or ml/Lit
OD (610 nm) & Growth
on solid media
1 Hexaconazole 5% EC 1 ml 0.46b
2 Bordeaux mixture 1 % 0.28d
3 Copper oxychloride 50% WP 2 g 0.11e
4 Copper hydroxide 77% WP 2 g 0.09e
5 Carbendazim 50% WP 1 g 0.39c
6 Fosetyl- Al 80% WP 1 g 0.07e
7 Captan 70% WP+ Hexaconazole 5% WP 2 g 0.28d
8 Control 0.54a
CD (0.05) = 0.06; CV% = 11
Table 11: In vitro compatibility of fungicides against P. fluorescens
Kerala, India Dhanya et al. (2016)
33
48. Sr.
No.
Treatment
Disease Incidence (%)
Pooled (2012-13 to 2014-15)
Stem rot Collar rot Aflarot
1 ST of Trichoderma 31.29 (33.5) 8.33 (16.47) 1.84 (7.71)
2 ST of mancozeb75% WP 31.70 (33.94) 5.03 (12.79) 1.64 (7.27)
3 ST of carboxin 37.5 % + thirum 37.5 % 44.58 (41.67) 12.17 (20.31) 2.51 (8.90)
4 T2 +Seed treatment of Trichoderma 36.54 (36.77) 4.85 (12.44) 1.59 (6.96)
5 T3 +Seed treatment of Trichoderma 32.58 (34.27) 10.68 (18.29) 2.49 (8.88)
6
ST of carbendazim 12% WP+ mancozeb 63% WP + ST of
Trichoderma
30.31 (32.45) 2.42 (8.84) 1.58 (7.10)
7 ST of tebuconazole 2% DS + ST of Trichoderma 32.39 (33.90) 5.26 (13.02) 1.69 (7.39)
8 ST of thiram 75% SD + ST of Trichoderma 47.22 (42.93) 12.61 (20.69) 3.67 (10.9)
9 ST of imidacloprid 600 FS +ST of Trichoderma 43.62 (41.27) 9.05 (16.79) 2.42 (8.77)
10 Control 50.34 (45.28) 15.55 (22.27) 4.11 (11.5)
Table 18 : Compatibility of Trichoderma with different seed dressing agrochemicals used for the
management of diseases and pest in groundnut.
JAU, Junagadh Anon.(2015)
Figures in parenthesis are retransformed value 42
49. Sr. No. Treatments
Disease Incidence (%)
2012-13 2013-14 2014-15 Pooled
T1
Drenching of carbendazim 50%WP @ 0.05% one
month after sowing
11.18 (19.53) 8.83 (17.29) 12.93 (20.91) 11.13 (19.24)
T2
Three sprays of mancozeb 75% WP 0.25% at
35,50 and 65 DAS
7.11 (15.46) 12.75 (20.92) 8.87 (17.27) 9.62 (17.89)
T3
Three sprays of hexaconazole 5% EC 0.005% at
35,50 and 65 DAS
9.22 (17.67) 10.87 (19.25) 11.03 (19.22) 10.529(18.71)
T4
Soil application of T. harzianum one month
after germination of crop
4.09 (11.66) 5.66 (13.76) 5.77 (13.67) 5.28 (13.03)
T5
T1 + Soil application of T. harzianum one
month after germination of crop
3.60 (10.93) 5.22 (13.21) 5.33 (13.26) 4.81 (12.46)
T6
T2+ Soil application of T. harzianum one month
after germination of crop
5.16 (13.13) 5.91 (14.07) 6.87 (14.99) 6.11 (14.07)
T7
T3+ Soil application of T. harzianum one month
after germination of crop
4.27 (11.93) 6.76 (15.08) 6.07 (14.18) 5.77 (13.73)
T8
Control 12.71 (20.88) 14.27 (22.19) 14.53 (22.25) 13.94 (21.78)
Table 19 : Cumin wilt incidence under foliar application of fungicides and soil application of ‘Sawaj Trichoderma’
JAU, Junagadh Anon.(2015)
43
50. Table 20 : Evaluation of compatible fungicides with Trichoderma spp. in tomato crop under in vivo
conditions
Sr.
No.
Treatments
Concentration
(%)
Population density of
T. viride (Cfu g-1 soil)
Population density of
T. harzianum (Cfu g-1 soil)
30 DAT 60 DAT 30 DAT 60 DAT
1.
Mancozeb
(75% WP)
0.15 4.44 4.70 4.33 4.78
0.20 4.22 4.52 4.22 4.55
0.25 3.89 4.19 3.89 4.33
2.
Azoxystrobin
(23% SC)
0.05 4.78 4.93 4.33 5.00
0.10 4.67 4.89 4.22 4.89
0.15 4.00 4.33 3.89 4.78
3.
Metalaxyl
(35% WS)
0.15 3.89 4.30 3.67 4.45
0.20 3.67 4.00 3.56 4.22
0.25 3.22 3.63 3.33 3.89
4. Control - 5.33 5.44 5.22 5.44
S. Em± 0.24 0.20 0.28 0.27
CD @ 5% 0.71 0.58 0.82 0.80
44 Shashi kumar et al., (2019)
Karnataka,India
52. Aqueous suspensions of conidia of Trichoderma harzianum wild strain WT-6 were
placed on juice agar and exposed to ultraviolet (UV) radiation for 100 min.
Conidia of WT-6 from surviving colonies of the first irradiation were allowed to
germinate on the agar before a second exposure to UV for 100 min.
The irradiated plates were incubated at 25 C under fluorescent light, and the resulting
colonies of T. harzianum were isolated and grown on the medium. Conidia from the
colonies that survived the second irradiation were placed on agar and UV-
irradiated for 100 min.
Of 36 colonies that survived the three irradiations, 19 colonies from the third series
tolerated high concentration of benomyl (100-500 mg/ml) as indicated by growth
in solid and liquid media and conidial germination tests on benomyl-amended agar.
Evaluation of new biotypes of Trichoderma harzianum for tolerance to
benomyl and enhanced bio control capabilities.
45
USA Papavizas et al., (1982)
53. The UV-induced biotypes differed
considerably from WT-6 in
appearance, growth habit,
fungitoxic metabolite production
against a pathogen ability to survive
in soil.
Certain UV-induced biotypes that
were also tolerant to benomyl
suppressed the saprophytic activity
of Rhizoctonia solani in soil more
effectively than did the wild strain.
46
54. Induction of fungicide resistance for enhanced cellulase production in
Trichoderma harzianum
In this study UV light was used to induced mutations in T. harzianum.
Spores from one week old cultures were placed into coconut water
medium and then exposed to UV light for 50 minutes.
Spores of surviving colonies were plated and exposed for 100 minutes.
Survivors were re-exposed for another 100 minutes.
The best growing colonies that survived this treatment was screened
for resistance to benomyl, the active ingredient in the fungicide benlate.
A highly resistant strain, HUV 250, was obtained. It survived up to 562
microgram benomyl/ml, a concentration three times that of the full
dosage recommended for this fungicide.
47
Sajise et al., (1994)
Phillippines
55. The isolates that survived the first 50 and 100 minutes exposure to UV
and the parental strain do not grow even at 1 microgram/ml benomyl.
Initial studies indicated that the benlate resistance was maintained even if
HUV 250 was kept at benlate-free medium.
A comparison of the cellulases from crude enzyme extract obtained
through ammonium sulfate precipitation of the parental strain and those
of HUV 250 was done.
Cellulase (CM-ase) and B-glucosidase activities of the new strain were
significantly higher than those of the parental.
However, morphologically the two organisms are very similar.
48
56. Development of UV-induced Carbendazim-resistant mutants of
Trichoderma harzianum for integrated control of damping-off disease
T. harzianum is very sensitive to carbendazim which is used as a seed-
dressing fungicide for the control of fungal pathogens.
Hence in the present study, carbendazim-resistant mutants of T. harzianum
were developed through UV-irradiation.
These mutants grew well in PDA medium containing the carbendazim even at
100 µg/ml.
Sustained production of cellulase and chitinase by these mutants in the
presence of carbendazim in the growth medium was observed.
Seed treatment with carbendazim followed by application of carbendazim-
resistant mutants of T. harzianum resulted in better plant stand, plant
biomass and less damping-off disease caused by R. solani in both
greenhouse and field conditions.
Jayraj and Radhakrishnan (2003)
TNAU, India 49
57. Metalaxyl (500 ppm)
Thiram(500 ppm)
Mancozeb (1000 ppm)
Copper oxycloride(1000 ppm)
Azoxystrobin(1000 ppm)
Sulphur 80 WDG(1500 ppm)
Conclusion
In Trichoderma spp.
Carbendazim (1000 ppm)
Mancozeb (2000 ppm)
Hexaconazole(3000 ppm)
Propiconazole(3000 ppm)
Tebuconazole(3000 ppm)
Azoxystrobin(3000 ppm)
In Pseudomonas spp.
Fungicides tolerance up to..
Incompatible with..
Carbendazim
Hexaconazole
Propiconazole
Tebuconazole
Copper oxycloride
Generally, Bacterial bio control agent Pseudomonas
spp. More tolerant to fungicides than Trichoderma spp.
Fungicides tolerance increased in
UV Induced mutants of Trichoderma spp.
50