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Parasitic
wasps
Rufus
Isaacs, MSU
Entomology |
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Most
parasitic wasps are tiny, and they often
develop inside their hosts, so detecting them can be difficult.
Some recognizable signs of parasitism include unusual host
(pest) behavior, host body darkening, and the presence of
emergence holes or cocoons on the pest.
Trichogramma
wasps are egg parasites of many insects, including
cranberry fruitworm and leafrollers. Parasitized eggs are
dark black rather than the yellow-cream of healthy eggs.
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| Blueberry maggot parasitoid |
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Braconids
and ichneumonids are small black, orange, or
yellow wasps that prey on immature insects such as cranberry fruitworm
larvae. Adults are less than 10 mm long, and many species are
found in blueberry fields. |
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