Question

What is NOT a disadvantage of chemical control of pests and weeds?

• A. Biomagnification
• B. Environmental pollution
• C. They can get rid of useful insects and microorganisms
• D. They rely on natural predation

Answer 1

The correct option is D They rely on natural predation

Chemicals used to control pests and weeds cause pollution of soil and water. They also result is biomagnification, which means accumulation of the chemicals in the higher trophic levels of food chains. They are often indiscriminate, so they kill both useful and harmful organisms. However, it is biocontrol agents and not chemical control agents that rely on natural predator-prey relationships.