This presentation is only with respect to the Parasitic Weed and their management tactics, falling under the category of Specificity while classifying weeds.
Foliar feeding is a technique of feeding plants by applying liquid fertilizer directly to their leaves. Plants are able to absorb essential elements through their leaves. The absorption takes place through their stomata and also through their epidermis.
Foliar feeding is a technique of feeding plants by applying liquid fertilizer directly to their leaves. Plants are able to absorb essential elements through their leaves. The absorption takes place through their stomata and also through their epidermis.
The Contingency plans cover contingency strategies to be taken up by farmers in response to major weather related aberrations such as delay in onset and breaks in monsoon causing early, mid and late season droughts, floods, unusual rains, extreme weather events such as heat wave, cold wave, frost, hailstorm and cyclone.
High Density Planting is a method of densely planting plant with plant population more than the optimum to get higher productivity in terms of quality and yield by manipulating the tree architecture and planting systems such as use of dwarfing rootstock, interstocks, scions, spurs; intensive use of growth regulators, training and pruning, cultural practices and reducing the spacing. The main principle is to improve efficiency of horizontal and vertical space utilisation per unit time, and resources and input utilisation. There is a balance between the vegetative and fruiting structures without affecting the plant health. Advantages include increased productivity, high income, efficient use of resources and mechanisation and operational efficacy
An integrated weed management approach to land management combines the use of complementary weed control methods such as grazing, herbicide application, land fallowing, and biological control.
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The Contingency plans cover contingency strategies to be taken up by farmers in response to major weather related aberrations such as delay in onset and breaks in monsoon causing early, mid and late season droughts, floods, unusual rains, extreme weather events such as heat wave, cold wave, frost, hailstorm and cyclone.
High Density Planting is a method of densely planting plant with plant population more than the optimum to get higher productivity in terms of quality and yield by manipulating the tree architecture and planting systems such as use of dwarfing rootstock, interstocks, scions, spurs; intensive use of growth regulators, training and pruning, cultural practices and reducing the spacing. The main principle is to improve efficiency of horizontal and vertical space utilisation per unit time, and resources and input utilisation. There is a balance between the vegetative and fruiting structures without affecting the plant health. Advantages include increased productivity, high income, efficient use of resources and mechanisation and operational efficacy
An integrated weed management approach to land management combines the use of complementary weed control methods such as grazing, herbicide application, land fallowing, and biological control.
Tillage is the mechanical manipulation of soil with tools and implements for obtaining conditions ideal for seed germination, seedling establishment and growth of crops.
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
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In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptx
Parasitic weeds
1.
2. Out of 2,50,000 plant species, weeds constitute about 250 species, which are prominent in agricultural
and non-agricultural system. Under world conditions about 30,000 species are grouped as weeds and
are further classified. Among the 10 Classification, one is Based on the Specificity.
On the Basis of Specificity, the weeds are of following types:
¡ Poisonous Weeds
¡ Parasitic Weeds
¡ Aquatic Weeds
3. The parasite weeds re either total or partial which means, the weeds that depend completely on the host
plant are termed as total parasites while the weeds that partially depend on host plant for minerals and
capable of preparing its food from the green leaves are called as partial parasites. Those parasites which
attack roots are termed as root parasites and those which attack the shoot of other plants are called as
stem parasites.
i. Total Root Parasite- Orobanche cernua on Tobacco
ii. Partial Root Parasite- Striga lutea on Sugarcane and Sorghum
iii. Total Stem Parasite- Cuscuta chinensis on Lucerne and Onion
iv. Partial Stem Parasite- Loranthus longiflorus on Mango
4. It is a total parasitic weed observed on different host plants according to its different species e.g. Cernua on
Tobacco and Sunflower. It is commonly called as Broomrape.
Control Measures
£ Proper rotation with pepper, rice linseed, sun-hemp, sorghum, sesame etc. for tobacco area.
£ Glyphosate @0.5 kg a.i./ha is found effective.
£ Orobanche growing outside the crop field should be destroyed by frequent tillage before seed setting.
6. Also called as Witch Weed. It is an annual parasitic herb with a wide range of the host crop plants in India.
In India, the common host plants are sorghum, sugarcane, bajara and maize.
Control Measures
† Host plants are rotated with cotton, sunflower, cow pea, groundnut, certain beans, and castor to minimize
the infestation of Striga.
† In heavily infested areas, both parasitic weed and crop should be ploughed down at early stage.
† Hand weeding can reduce the weed population.
† Soil may be fumigated with Methyl Bromide.
† Herbicidal Spray of 2,4-D (amine) @1.2 kg a.i./ha on flowers of Striga or pre-planting application of
Dicanba or Fenac @2 kg a.i./ha are very effective.
† Use of resistant variety.
8. It is a parasitic leafless herb with golden yellow, shining wiry stem, found on trees, cultivated crops and
hedges. Also Called as Dodder or Amarvel or Akashbel.
Control Measures
† Cuscuta can be pulled out and buried. It can be controlled by proper crop rotation.
† Paraquat 1% spray with a high volume sprayer will kill dodder.
† The seed of Lucerne are to be treated with 5% to 10% solution of common salt for five minutes. The light
seed of the Cuscuta will float on the surface of water.
10. It is a phanerogamic parasite found mostly in the tropics rooting beneath the bark of the trees, particularly
Mango. It derives whole of its nutrient from juice of host plants.
Control Measures
† Affected branches of the host plants should be periodically cleaned or cut down before monsoon.
† High speed diesel will be helpful to kill the foliage of this parasitic weed.
† Paraquat 1% spray will be helpful to kill the foliage of this parasitic weed.
† Paraquat + 2,4-D @3.5 kg each in 160 litre water/ha with rocker sprayer on the infested area can kill
Loranthus by both contact and translocations to be taken to protect the host tree.