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Striped stem borer

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Another important stem borer species in Asia is the striped stem borer, Chilo suppressalis. It is found in the Indian sub-continent, South and East Asia, China, Iran, and Southern Europe.

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The adult lays its eggs on the basal half of the leaves. They resemble those of the dark-headed stem borer but are more yellowish, while those of the dark-headed stem borer are whitish. The eggs hatch in about 5 days.

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The larva is fully grown in about 25 days. The mature larva has a yellowish brown head and 3 dorsal and 2 lateral brownish abdominal stripes.

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Moths emerge after about 5 days of pupation.

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The moth is straw-colored to light brown with silvery scales and several black dots at the tip of the forewing. The hindwing is yellowish-white.

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The life cycle of the striped stem borer requires about 35 days to complete. In cooler regions, 1 or 2 generations are produced per year; fully grown larvae diapause or lie dormant during the cool season. In the tropics, 6 or more generations are possible per year.

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