Southwestern corn borer management in Missouri (2022)
Abstract
"This insect overwinters as a full-grown larva at the base of the corn stalk. The dull white moths with their prominent, snoutlike mouthparts (Figure 1, left) do not feed and prefer to rest during daylight hours on corn plants or border vegetation. After female moths emerge and mate in mid- to late May, they lay their eggs singly or in small masses (3 to 5 eggs per mass) at night. Eggs are usually deposited on the upper leaf surface, and the eggs of the second generation are deposited at the ear zone or a node above or below the ear. A female moth is capable of laying 100 to 400 eggs in her short lifespan (approximately 5 days). Eggs are initially creamy white but develop three red transverse bars within 36 hours of being laid, and these bars remain until the larva's emergence (approximately 5 days)."--Page 1.
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