Iowa Pesticide Applicator Practice Exam

What is a consequence of pesticide residues in spray tanks?

1. Improved performance of nozzles

2. Corrosion of metal components

3. Increased pressure in the system

4. Lower environmental risk

The correct answer is: Corrosion of metal components

When pesticide residues remain in spray tanks, one significant consequence is the corrosion of metal components. Pesticides can contain various chemical formulations which may be corrosive to certain metals over time, especially if residues are left unchecked. This corrosion can lead to deterioration of tank materials, pumps, fittings, and other parts of the spraying apparatus, reducing the overall effectiveness and safety of the equipment. Regular cleaning and maintenance of spray tanks help mitigate this risk, ensuring that the equipment remains functional and safe for future pesticide applications. The other options do not accurately reflect the consequences related to pesticide residues. While nozzle performance can be impacted by various factors, improved performance is not a consequence of pesticide residues. Increased pressure in the system is typically a result of other operational issues rather than residues alone. Finally, pesticide residues would generally raise environmental concerns rather than lowering environmental risk, as they can contaminate water sources and affect non-target organisms.