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Diseases of CropsDiseases of Crops
GrapesPotato Tomato Cucurbits
Solutions
What you see here …What you see here …
 This is like cancer in Potato crop ; it’s called Late Blight
……is not seen here !is not seen here !
Late Blight - PotatoLate Blight - Potato
 Late blight spread defoliating the field…
 ….and devastating the green field
Late Blight - PotatoLate Blight - Potato
 One of the most devastating disease in human history
 Caused great Irish famine during 1845 – 47
 1.0 million people d...
 Small water-soaked lesions appear on the leaf margins - grow into large
purplish black necrotic lesions and cover the le...
 Lower leaves are affected first and then the infection spreads to healthy
leaves
Late Blight - PotatoLate Blight - Potato
Late blight also appears on the stem and
the affected stem becomes weak &
collapses above the lesion causing death
of the ...
 Excessive humidity above 80% & temperature of around 15-20 C,
 wind and rain splashes.
 High soil moisture, dew drops ...
 Zoospores
Main Page
Late Blight - PotatoLate Blight - Potato
Solution
Why is it so ??Why is it so ??
Late Blight of TomatoLate Blight of Tomato
 Lesions start as irregular, greenish, water-soaked spots on leaves, petioles,...
 lesions first appear on the leaves
Late Blight of TomatoLate Blight of Tomato
 Close-up of leaf with late blight, whitish fungal growth is characteristic of late
blight. Look for it early-morning whi...
Late blight infected tomato leaf. Note
the brown, shriveled, dried area.
Late blight infected tomato plant with
dead, brow...
 Stems and fruit show evidence of late blight
Late Blight of TomatoLate Blight of Tomato
Main Page Solution
 Early lesions of downy mildew usually appear water-soaked on the underside
of leaves.
Downy Mildew in CucurbitsDowny Mil...
Cucurbits – Downy MildewCucurbits – Downy Mildew
 downy mildew lesions usually do not enlarge beyond major veins, giving
...
Downy Mildew in CucurbitsDowny Mildew in Cucurbits
 Downy Mildew
 Yellow spots on the upper surface of the leaves are ea...
 Dark purplish gray spores of the
downy mildew fungus only
develop on lower surfaces of
leaves and are easily distinguish...
 Lower surface of pumpkin leaf affected by downy mildew lacking the
pathogen’s characteristic purplish gray sporulation.
...
Downy Mildew in CucurbitsDowny Mildew in Cucurbits
 Leaf tissue affected by downy mildew can change quickly from yellow to
brown as it is killed.
Downy Mildew in CucurbitsD...
 Downy Mildew
 These are not diagnostic as similar spots can occur with other diseases,
notably powdery mildew
Downy Mil...
What is downy mildew ?
Downy mildew - GrapesDowny mildew - Grapes
Downy mildew - GrapesDowny mildew - Grapes
 Lesions are yellowish and oily on the upper surface of leaf with a whitish
do...
Downy mildew - GrapesDowny mildew - Grapes
 Primary infection from the oospores and dormant mycelia of the host tissues.
...
Downy mildew - GrapesDowny mildew - Grapes
 The infected portion of leaves turns brown and can not support the growing
bu...
Downy mildew - GrapesDowny mildew - Grapes
 Mildew growth may cover the entire leaf blade which turns brown and
withers.
Downy mildew - GrapesDowny mildew - Grapes
 Young berries are highly susceptible becomes grayish covered with a downy
fel...
The Solutions !!!
Tiger is ‘special’
New
Chemistry
New
mode of
action
New
generation
fungicide
 Active Ingredient : Dimethomorph (DMM)
 Chemical Group - Cinnamic Acid derivative
 Formulation: 50% WP
 Highly effect...
# 4 great benefits of Tiger!!
 Cell wall lysis
 Effective against different
stages of fungal lifecycle
 Translaminar Ac...
DMM disintegrates cell wall to kill the
pathogen. This mode of action is unique
MEANS BETTER EFFICACY
1
Tiger – Cell wall ...
Tiger : Acts at different stages in life cycle
NO SCAPE FOR DOWNY MILDEW !
2
Tiger : Trans Laminar
LONGER DURATION OF CONTROL
3
 Good uptake into sprayed leaves
 translaminar from upper to lower leaf surface
 and within the leaf towards the tip an...
TM
Tiger: Antisporulant
PREVENTS THE DISEASE FROM SPREADING
4
Doses
CROP Diseases Dose per acre
Potato Late blight 200g Tiger + 600 g Mancozeb
or
200g Tiger + 600 g COC
CROP Diseases D...
CROP Diseases Recommendation Dose per acre
Grapes Downy
Mildew
at 4 - 5 Leaf stage
at 5 - 7 Leaf stage
at 7 - 10 Leaf
stag...
Pack Sizes
100 gm 200 gm
Main Page
Selection for ResistanceSelection for Resistance
Initial Population Resistant Population
Survivor Population
Reproduction
...
Fungicide Alternation / +ves of mixtures
Prevents repeated selection for resistant individuals
A B
Fungicide B indiscrimin...
FAQs
Why should I mix Tiger with Mancozeb or COC ?
Tiger is a systemic fungicide and should always be used in combination with
...
When should I use Tiger?
Tiger should be used before or coinciding with disease onset, as preventive
treatment against Lat...
Does Tiger exhibit curative action ?
Tiger has a special advantage of being a strong anti sporulant,
which arrests the spr...
Is Tiger superior than existing systemic fungicides used in the
control of Late Blight in Potato ?
In the management of La...
What is MRL (ppm) and PHI ( days ) ?
PHI-16 Days (P),26 Days(G) MRL-0.5 ppm
HI
LO
Desirable to grower
Not desirable
LO
HI
...
Tiger ppt
Tiger ppt
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Tiger ppt

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Tiger is a systemic fungicide and should always be used in combination with contact fungicides, Mancozeb or COC as part of resistance management strategy.The combination of systemic and contact activity on the Late Blight pathogen prevents it from developing resistance.

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Tiger ppt

  1. 1. Diseases of CropsDiseases of Crops GrapesPotato Tomato Cucurbits Solutions
  2. 2. What you see here …What you see here …
  3. 3.  This is like cancer in Potato crop ; it’s called Late Blight ……is not seen here !is not seen here !
  4. 4. Late Blight - PotatoLate Blight - Potato  Late blight spread defoliating the field…
  5. 5.  ….and devastating the green field Late Blight - PotatoLate Blight - Potato
  6. 6.  One of the most devastating disease in human history  Caused great Irish famine during 1845 – 47  1.0 million people died and similar no. of people migrated from Ireland to USA & Europe  Till today it is basis of research for chemical companies to discover new chemical Late Blight - PotatoLate Blight - Potato
  7. 7.  Small water-soaked lesions appear on the leaf margins - grow into large purplish black necrotic lesions and cover the leaf  On the lower surface of the leaf, whitish downy growth below the lesion Late Blight - PotatoLate Blight - Potato
  8. 8.  Lower leaves are affected first and then the infection spreads to healthy leaves Late Blight - PotatoLate Blight - Potato
  9. 9. Late blight also appears on the stem and the affected stem becomes weak & collapses above the lesion causing death of the plant. Defoliated plants in the infected areas render a patchy look of the field. Late Blight - PotatoLate Blight - Potato
  10. 10.  Excessive humidity above 80% & temperature of around 15-20 C,  wind and rain splashes.  High soil moisture, dew drops & dip in night temperature facilitate disease spread. Late Blight - PotatoLate Blight - Potato
  11. 11.  Zoospores Main Page Late Blight - PotatoLate Blight - Potato Solution
  12. 12. Why is it so ??Why is it so ??
  13. 13. Late Blight of TomatoLate Blight of Tomato  Lesions start as irregular, greenish, water-soaked spots on leaves, petioles, and/or stems
  14. 14.  lesions first appear on the leaves Late Blight of TomatoLate Blight of Tomato
  15. 15.  Close-up of leaf with late blight, whitish fungal growth is characteristic of late blight. Look for it early-morning while relative humidity is high. Late Blight of TomatoLate Blight of Tomato
  16. 16. Late blight infected tomato leaf. Note the brown, shriveled, dried area. Late blight infected tomato plant with dead, brown leaves and stem. Late Blight of TomatoLate Blight of Tomato
  17. 17.  Stems and fruit show evidence of late blight Late Blight of TomatoLate Blight of Tomato Main Page Solution
  18. 18.  Early lesions of downy mildew usually appear water-soaked on the underside of leaves. Downy Mildew in CucurbitsDowny Mildew in Cucurbits
  19. 19. Cucurbits – Downy MildewCucurbits – Downy Mildew  downy mildew lesions usually do not enlarge beyond major veins, giving spots an angular appearance.
  20. 20. Downy Mildew in CucurbitsDowny Mildew in Cucurbits  Downy Mildew  Yellow spots on the upper surface of the leaves are early symptoms of downy mildew.
  21. 21.  Dark purplish gray spores of the downy mildew fungus only develop on lower surfaces of leaves and are easily distinguished from white spores of fungus.  These spores are diagnostic but unfortunately are not always present Downy Mildew in CucurbitsDowny Mildew in Cucurbits
  22. 22.  Lower surface of pumpkin leaf affected by downy mildew lacking the pathogen’s characteristic purplish gray sporulation.  Diagnostic spores may form when an affected leaf is placed with damp paper towel in a closed paper for 12-24 hours. Downy Mildew in CucurbitsDowny Mildew in Cucurbits
  23. 23. Downy Mildew in CucurbitsDowny Mildew in Cucurbits
  24. 24.  Leaf tissue affected by downy mildew can change quickly from yellow to brown as it is killed. Downy Mildew in CucurbitsDowny Mildew in Cucurbits
  25. 25.  Downy Mildew  These are not diagnostic as similar spots can occur with other diseases, notably powdery mildew Downy Mildew in CucurbitsDowny Mildew in Cucurbits Main Page Solution
  26. 26. What is downy mildew ? Downy mildew - GrapesDowny mildew - Grapes
  27. 27. Downy mildew - GrapesDowny mildew - Grapes  Lesions are yellowish and oily on the upper surface of leaf with a whitish downy growth on the corresponding lower surface.
  28. 28. Downy mildew - GrapesDowny mildew - Grapes  Primary infection from the oospores and dormant mycelia of the host tissues. Secondary spread by the sporagia and zoospores.
  29. 29. Downy mildew - GrapesDowny mildew - Grapes  The infected portion of leaves turns brown and can not support the growing bunch
  30. 30. Downy mildew - GrapesDowny mildew - Grapes  Mildew growth may cover the entire leaf blade which turns brown and withers.
  31. 31. Downy mildew - GrapesDowny mildew - Grapes  Young berries are highly susceptible becomes grayish covered with a downy felt of fungus.
  32. 32. The Solutions !!!
  33. 33. Tiger is ‘special’ New Chemistry New mode of action New generation fungicide
  34. 34.  Active Ingredient : Dimethomorph (DMM)  Chemical Group - Cinnamic Acid derivative  Formulation: 50% WP  Highly effective against Oomycetes  Long duration control Tiger - Introduction
  35. 35. # 4 great benefits of Tiger!!  Cell wall lysis  Effective against different stages of fungal lifecycle  Translaminar Action  Antisporulant Packs Doses
  36. 36. DMM disintegrates cell wall to kill the pathogen. This mode of action is unique MEANS BETTER EFFICACY 1 Tiger – Cell wall Lysis
  37. 37. Tiger : Acts at different stages in life cycle NO SCAPE FOR DOWNY MILDEW ! 2
  38. 38. Tiger : Trans Laminar LONGER DURATION OF CONTROL 3
  39. 39.  Good uptake into sprayed leaves  translaminar from upper to lower leaf surface  and within the leaf towards the tip and margins Treated leaf Redistributi on of radio- active labeled Dimethomor ph in the plant 3 DAT 7 DAT Locally systemic Redistribution of Tiger in Grapevine
  40. 40. TM Tiger: Antisporulant PREVENTS THE DISEASE FROM SPREADING 4
  41. 41. Doses CROP Diseases Dose per acre Potato Late blight 200g Tiger + 600 g Mancozeb or 200g Tiger + 600 g COC CROP Diseases Dose per acre Tomato Late blight 200g Tiger + 600 g Mancozeb or 200g Tiger + 600 g COC
  42. 42. CROP Diseases Recommendation Dose per acre Grapes Downy Mildew at 4 - 5 Leaf stage at 5 - 7 Leaf stage at 7 - 10 Leaf stage 200g Tiger + 500 g Mancozeb/COC 225g Tiger + 600 g Mancozeb/COC 250g Tiger + 800 g Mancozeb/COC Doses CROP Diseases Recommendation Dose per acre Cucurbits Downy Mildew At initial disease stages 200g Tiger + 600 g Mancozeb Or 200g DMM + 600 g COC
  43. 43. Pack Sizes 100 gm 200 gm Main Page
  44. 44. Selection for ResistanceSelection for Resistance Initial Population Resistant Population Survivor Population Reproduction The development of Practical Resistance is a step-wise process Naturally occurring resistant individual
  45. 45. Fungicide Alternation / +ves of mixtures Prevents repeated selection for resistant individuals A B Fungicide B indiscriminately controls Fungicide A - resistant individuals and vice-versa Alternation must be with fungicides having different MOA’s!!!
  46. 46. FAQs
  47. 47. Why should I mix Tiger with Mancozeb or COC ? Tiger is a systemic fungicide and should always be used in combination with contact fungicides, Mancozeb or COC as part of resistance management strategy.The combination of systemic and contact activity on the Late Blight pathogen prevents it from developing resistance. What if it rains after application of Tiger? Tiger enters inside the leaf within 2 hours after application due to its translaminar activity and continues to protect your crop from inside. Will Tiger have any adverse effect on growth of the plant ?No. Tiger is absolutely safe for the plant, it helps in retaining green foliage by effectively controlling the disease. FAQs
  48. 48. When should I use Tiger? Tiger should be used before or coinciding with disease onset, as preventive treatment against Late Blight of Potato. Benefit from using tiger are maximized when it is applied in the early spray rounds (e.g. in place of first spray of Metalaxyl/Curzate) How long does Tiger continue to protect after it is applied ? The duration of effectiveness depends on weather conditions prevailing but when used with contact fungicides, Tiger actively protects up to 10 days under moderate disease conditions, or 5 - 7 days under severe conditions. Use of Tiger at recommended doses and through coverage is important for superior control of Late Blight on Potato. Can Tiger also contain all other diseases of Potato ? No. Tiger works only on Late Blight. FAQs
  49. 49. Does Tiger exhibit curative action ? Tiger has a special advantage of being a strong anti sporulant, which arrests the spread of disease after infection. However, As you are aware, right timing of application is the first defense against Late Blight an hence Tiger should be applied either preventive or as early curative i.e in initial stages of infection. Can Tiger also protect newly emerging foliages ? Yes. Tiger enters inside the plant by diffusion process and protects the new foliage emerging soon after application. How ever, under the disease favoring weather conditions and high disease pressure the potato crop requires frequent rounds of Tiger sprays at shorter intervals. FAQs
  50. 50. Is Tiger superior than existing systemic fungicides used in the control of Late Blight in Potato ? In the management of Late Blight, it is important to rotate chemicals with different modes of action thereby not allowing the disease to become “ resistant” to a frequently used product / mode of action. The Indian potato grower, after a long wait, is finally getting a better choice in the form of Tiger . a) because it contains a totally new active ie Tiger , and b) It’s mode of killing the pathogen is unique (cell wall Lysis) and “ different” from existing systemic fungicides. The combined impact of both above points is a brand new tool for effectively controlling lateblight. Can it be mixed with any other fungicide or insecticide commonly used in Potato ? Tiger is compatible with commonly used contact fungicides like Metiram, Mancozeb and COC. Likewise, it can be mixed with commonly used insecticides. It is always prudent to do a small test by mixing the 2 different chemicals to check for compatibility prior to spraying FAQs
  51. 51. What is MRL (ppm) and PHI ( days ) ? PHI-16 Days (P),26 Days(G) MRL-0.5 ppm HI LO Desirable to grower Not desirable LO HI MRL PHI MRL Main Page

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