Pest Control Aircraft Pilot Practice Test

What is the most serious effect resulting from over-application of pesticides due to poor calibration?

1. Reduced efficacy

2. Phytotoxic effect on treated plants

3. Pest resistance

4. Environmental contamination

The correct answer is: Phytotoxic effect on treated plants

The most serious effect resulting from over-application of pesticides due to poor calibration is the phytotoxic effect on treated plants. When pesticides are applied in excessive amounts, they can cause damage to the plants themselves, leading to symptoms such as leaf burn, wilting, or even plant death. This not only harms the target crops but can also negatively impact the overall ecosystem, reducing crop yields and potentially affecting the health of the plants in the surrounding area. In contrast to other potential issues, such as reduced efficacy, pest resistance, or environmental contamination, the phytotoxic effect directly impacts the immediate health and viability of the plants, which is crucial for agricultural success. A plant that is suffering from phytotoxicity could be unable to recover, thus affecting the farmer's yield and economic viability. While the other effects can be significant, the destructive nature of phytotoxicity makes it a particularly critical concern in the context of pesticide application.