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Lesson Nine |
Biological Pest Control 9-3 |
Pest:
Thrips:
Thrips are found in crops all over the world. Crops are |
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Due to their small size, the damage thrips do is usually spotted before the thrips are noticed. Damage appears as small yellow speckles on the leaves later followed by a silvery sheen on leaf surfaces. The thrips feed by scraping at tender leaves, with most damage occurring on new growth. They are only 1/12" long, but can move very quickly. Adults look similar to a small worm with wings. Thrips can also carry and transmit plant disease. |
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Biological Control:
Amblyseius cucumeris and Orius laevigatus
Amblyseius cucumeris is an effective predator of young thrip larvae. Orius laevigatus, another
predator, is often applied in conjunction with Amblyseius because they kill adults and larger
lar-
val stages of thrips.
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