CPA CPA - Certified Pesticide Applicator Pesticide Resistance Management Questions and Answers

Question 1

Pesticide resistance is BEST defined as:

Accepted Answer

A heritable trait in a pest population that reduces the effectiveness of a pesticide

Answer

A pest's temporary avoidance of a treated area

Answer

The chemical breakdown of a pesticide in the environment

Answer

A regulatory limit on how often a pesticide can be applied

Question 2

Which pest management practice is MOST effective at slowing the development of pesticide resistance?

Accepted Answer

Rotating pesticide mode-of-action (MOA) classes

Answer

Increasing the pesticide application rate each season

Answer

Applying the same pesticide product repeatedly each year

Answer

Using only one pesticide class throughout the entire growing season

Question 3

What is a 'mode of action' (MOA) in pesticide terminology?

Accepted Answer

The specific biochemical or physiological process in a pest that a pesticide disrupts

Answer

The physical form in which a pesticide is applied

Answer

The geographic area where a pesticide is registered for use

Answer

The speed at which a pesticide degrades in soil

Question 4

Which of the following is a sign that a pest population may have developed resistance to a pesticide?

Accepted Answer

Normal application rates fail to provide expected levels of control over time

Answer

Pests avoid the treated area entirely before dying

Answer

Pest populations are controlled at lower-than-label rates

Answer

Pests reproduce more slowly after treatment

Question 5

IRAC (Insecticide Resistance Action Committee) group numbers on pesticide labels help applicators:

Accepted Answer

Identify the mode of action and rotate between different groups to manage resistance

Answer

Determine the legal re-entry interval for workers

Answer

Calculate the correct application rate per acre

Answer

Understand the environmental fate of the product

Question 6

Cross-resistance in pest management means that a pest resistant to one pesticide:

Accepted Answer

May also be resistant to other pesticides that share the same mode of action

Answer

Can be controlled by increasing the dose of that pesticide

Answer

Will lose resistance if left untreated for one season

Answer

Becomes susceptible to pesticides from a completely different class