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b) What are harmful effects of weeds and their methods of control. |
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Answer» Weeds compete for essential components required by crops and the demand increases as per growth. They compete for light, water, nutrients, and space. They reduce the yield and manipulate the quality of the product. Sometimes they are sources of diseases as well. Method if weed control : Weeds can be controlled in many ways. Weed management includes land preparation, water management, hand weeding, hand hoeing, crop rotation, and herbicides. Land preparation helps in the removal of seeds and uprooting of weeds before sowing of seeds of the main crop. Hand weeding is done manually which is very tiresome and time-consuming. Nowadays, weedicides and herbicides are most commonly used and are effective ways of weeding. Chemicals like MCPA, 2,4-D are some commonly used weedicides. They can be applied at three stages like before and after crop planting and after weed emergence. But these chemicals can cause health hazards and environmental issues |
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