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Course Content
Concept of weed
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Introduction
Definitions of weeds
Characteristics of weeds
Classification of weeds
Economic importance of weed and losses caused by weeds
Ecology of weed
Weed Seedbank and Seed Dormancy
Seed dormancy as survival mechanism
Persistence of weed
Crop-weed association, Allelopathy and Competition
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Introduction
Crop weed competition
Allelopathic Effect of Weeds on Crops
Factors influencing allelopathy
Mechanism of action of allelochemicals
Losses Caused by Weeds
Factors Affecting Competitive Ability of Crops against Weeds
Critical period of weed competition
Concept of weed management
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Introduction
Principles of weed control
Mechanical method of weed control
Merits and Demerits of Mechanical Method
Physical method of weed control
Cultural weed control
Merits and demerits of cultural method
Biological method of weed control
Chemical method of weed control in field crops
Integrated weed management practices in major field crops
IWM of Cuscuta in Lucerne
Herbicides
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Introduction
Classification of herbicides
Herbicide formulation
Methods of Herbicide Application
Soil application of herbicides
Foliar application
Factors Affecting the Efficacy of Herbicides
Environmental and health concern about herbicide: resistance and persistence in soil, effect on environment, precautions and safety measures in applying herbicides
Resources for revisions
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Identification of weeds
Master Principles and Practices of Weed Management – Notes, Case Studies & Practical Insights – with Rahul

Merits and demerits of cultural method

A. Merits of Cultural Method

  • Low cost for weed control
  • Easy to adopt
  • No residual Problem
  • Technical skill is not involved
  • No damage to crops
  • Effective weed control
  • Crop-weed ecosystem is maintained

 

B. Demerits of Cultural Method

  • Immediate and quick weed control is not possible.
  • Weeds are kept under suppressed condition
  • Perennial and problematic weeds cannot be controlled
  • Practical difficulty in adoption
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