CPA CPA - Certified Pesticide Applicator Pesticide Resistance Management Questions and Answers 2

Question 1

Which of the following resistance mechanisms involves a pest detoxifying a pesticide before it reaches its target site?

Accepted Answer

Metabolic resistance

Answer

Target-site resistance

Answer

Behavioral resistance

Answer

Penetration resistance

Question 2

An applicator notices that the same herbicide applied at label rates is no longer controlling a weed species that it previously controlled well. The FIRST recommended step is to:

Accepted Answer

Confirm correct identification of the weed and rule out application errors before concluding resistance

Answer

Immediately double the application rate

Answer

Switch to a herbicide from the same MOA group

Answer

Stop using all herbicides in that field for the entire season

Question 3

Which herbicide resistance classification group system do applicators use to guide MOA rotation decisions?

Accepted Answer

WSSA (Weed Science Society of America) MOA group numbers

Answer

EPA signal word categories (DANGER, WARNING, CAUTION)

Answer

NRCS soil survey classifications

Answer

OSHA hazard communication codes

Question 4

Which strategy BEST reduces selection pressure for insecticide resistance in a high-value crop?

Accepted Answer

Applying insecticides only when action thresholds are exceeded and rotating MOA classes between applications

Answer

Applying insecticides prophylactically every 7 days throughout the season

Answer

Using a single highly effective insecticide exclusively all season to avoid tank-mixing costs

Answer

Increasing spray volume to ensure complete coverage every application

Question 5

What is 'refuge' strategy in resistance management for Bt transgenic crops?

Accepted Answer

Planting non-Bt crop areas near Bt crops to maintain a population of susceptible insects

Answer

Applying Bt spray to refuge areas as a backup measure

Answer

Storing harvested grain away from treated fields

Answer

Designating areas where no pesticides of any kind are applied

Question 6

Multiple resistance in a pest population means that the population:

Accepted Answer

Has resistance mechanisms to two or more pesticide classes with different modes of action

Answer

Is resistant to pesticides in only one mode-of-action class

Answer

Requires multiple applications per season for full control

Answer

Develops resistance more slowly than single-MOA-resistant populations