Discussion
Which of the following would NOT reduce insect losses in a grain store?
Answer: D
Correct answer: Raising the bulk temperature to 30 degrees
Thirty degrees is close to the optimum for most storage insects, whose generation time there is under a month. Raising the bulk to that temperature would accelerate the infestation, not reduce it.
The other three all reduce insect losses. Cooling below 15 degrees arrests development entirely; fumigating a well-sealed structure kills the population outright, provided the concentration is held for the full exposure; and a controlled atmosphere of high carbon dioxide or low oxygen kills them without chemicals.
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