what are weeds? name one weedicides. what are the harmful effects of weeds in the crop yield. explain in the 10-15 line like long question. . . . . . . .
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Weeds are wild, unwanted plants that compete with normal healthy plants for water, light, soil nutrients and space. Weeds are competitive, persistent, pernicious, and interfere negatively with human activity.
Negative impacts of weeds are:
• They reduce crop quality by contaminating the commodity.
• They interfere with harvest and reduce the efficiency of farm equipment.
• Weeds reduce the carrying capacity of grazing lands and pastures.
• They serve as hosts for crop diseases or provide shelter for insects during winter. They limit the choice of crop rotation sequences and, cultural practices.
• Weeds produce chemical substances which are toxic to crop plants (allelopathy), animals or humans.
• Weeds impair quality and quantity of plant and animal products. Example: thorny weeds.
EXAMPLES OF WEEDICIDES- GLYOPHYTA, AtRAZINE, 2- 4D
Negative impacts of weeds are:
• They reduce crop quality by contaminating the commodity.
• They interfere with harvest and reduce the efficiency of farm equipment.
• Weeds reduce the carrying capacity of grazing lands and pastures.
• They serve as hosts for crop diseases or provide shelter for insects during winter. They limit the choice of crop rotation sequences and, cultural practices.
• Weeds produce chemical substances which are toxic to crop plants (allelopathy), animals or humans.
• Weeds impair quality and quantity of plant and animal products. Example: thorny weeds.
EXAMPLES OF WEEDICIDES- GLYOPHYTA, AtRAZINE, 2- 4D
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