Describe briefly the side effects of preventive and control measures of method diseases and pests of crops under the following headings: (a) chemical contro...

Answer Details

(a) Chemical control: This method involves the use of pesticides to prevent and control the spread of crop diseases and pests. However, the overuse of pesticides can have several negative side effects such as toxicity to non-target organisms, resistance development in pests, and environmental pollution.

(b) Biological control: This method involves the use of natural enemies of pests to control their population. The side effects of biological control are generally minimal as it involves the use of natural predators and parasites. However, the success of this method can depend on the availability and effectiveness of the natural enemies.

(c) Cultural control: This method involves the use of cultural practices such as crop rotation, intercropping, and sanitation to prevent and control the spread of crop diseases and pests. The side effects of cultural control are generally positive as it promotes sustainable agriculture and reduces the reliance on chemical pesticides. However, this method may require more labor and time compared to chemical control.