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Soybean
Stem Borer is a long-horned beetle that,
in it's larval stage, is an occasional pest of soybeans on the western plains.
Adults are 3/8 inch long, charcoal gray beetles with long antennae. The larvae
are cream-colored, legless grubs. Larvae tunnel through soybean stems in July
and August, eventually girdling plants at the base. Plants may lodge and become
difficult to harvest. Peak girdling activity occurs during September and
October. Soybeans should be harvested as soon as possible to minimize losses to
the stem borer.
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