MDARD Michigan Core Pesticide Applicator Practice Exam

Which factors can affect the extent of pesticide breakthrough?

1. Contact time

2. Concentration

3. Temperature

4. All of the above

The correct answer is: All of the above

The extent of pesticide breakthrough can indeed be influenced by multiple factors, and selecting "all of the above" recognizes that contact time, concentration, and temperature all play significant roles in determining how effectively a pesticide penetrates a target material and is retained. Contact time refers to the duration that the pesticide remains in contact with the surface or material it is supposed to affect. Longer contact time generally allows for more effective absorption or action of the pesticide, increasing the chances of successful application and reduced breakthrough. Concentration indicates the amount of pesticide present in the solution. Higher concentrations typically provide a more potent solution, which can enhance the pesticide's ability to overcome barriers, such as plant cuticles or soil particles, thus decreasing the chances of breakthrough. Temperature can also greatly impact pesticide effectiveness. Higher temperatures often increase the rates of chemical reactions and can enhance solubility and volatility, both of which can further influence the penetration and stability of pesticides on different surfaces. Understanding how these factors interrelate and affect pesticide application can help in the effective management of pest control strategies, ensuring that the products are used efficiently and safely.