Question

In the soil environment, pesticides can become unavailable to plants due to adsorption to which components?

1. Pesticides can become unavailable to plants when adsorbed to organic matter, clay minerals, and soil particles.
2. Adsorption to soil water makes pesticides unavailable to plants.
3. Pesticides adsorbed to air particles in the soil become unavailable.
4. Adsorption to plant roots makes pesticides unavailable.

• A. i only
• B. All
• C. i, iv
• D. iii, iv

Answer 1

Answer:

A. i only

• Transfer of pesticides and their break down products from the treatment site is called - Crop removal

• Adsorption - In the soil environment, the pesticides may get adsorbed to the organic matter, clay minerals and soil particles and remains unavailable to plants.

• Degradation - Pesticide degradation can occur either through chemical degradation, photo-degradation or microbial degradation.

• Bioaccumulation - Bioaccumulation refers to pesticide accumulation in various tissues of a living organism in concentration much higher than the surrounding environment.

• Bioaccumulation encompasses bioconcentration and biomagnification.