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Root-feeding
Pests: The most common root-feeding pests of strawberries in
Illinois include the strawberry crown borer, Tyloderma fragariae,
the strawberry root weevil, Otiorhynchus ovatus, and white
grubs in the genus Phyllophaga. Other below-ground pests,
including the strawberry rootworm, Paria fragariae, and strawberry
root aphid, Aphis forbesi, are rarely economically important
in Illinois. Although the crown borer, root weevil, and grubs are
all members of the insect order Coleoptera (the beetles and weevils),
their life histories differ considerably.
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Foliage-feeding
Pests: The foliage-feeding pests of strawberries in Illinois
include leafrollers (strawberry leafroller and others), the strawberry
rootworm, and two mite species -- the two-spotted spider mite and
the cyclamen mite. This summary reviews the life histories of these
pests and the practices that can be used for their management. Other
foliage-feeding pests, including the grape colaspis and strawberry
sawflies rarely damage strawberries in Illinois and are not covered
in this paper. Information on these less common pests is summarized
in Insect Pests of Strawberries in Ohio (Williams and Rings
1980).
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Flower-
and Fruit-feeding Pests: The common flower- and fruit-feeding
pests of strawberries in Illinois are the strawberry clipper, the
tarnished plant bug, the strawberry sap beetle, and slugs. In 1994
the eastern flower thrips, an insect that rarely causes significant
losses in strawberries, appears to have caused severe damage to
the crop in much of the east-central United States.
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