Bug Scout 1979
Make Careful Checks for Rootworm Beetles
(Tom Turpin, Entomologist, Purdue University)
I don't believe the insecticides slowed that hive down much!
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August 4, 1979

Pollen is the favorite food of corn rootworm beetles.  They also feed on leaves and silks.  Silk feeding can interfere with pollination and result in poorly-filled ears.

When beetle populations exceed five per ear and pollination is less than 50% complete, chemical control may be justified.  Control is normally profitable only when silks are kept trimmed to the shuck.  Remember, silks continue to grow until pollination is successful.

If sprays are required, alert local beekeepers.  Rootworm beetle sprays often drift to adjacent vegetation where bees are foraging.  Some bees visit cornfields for pollen and carry the insecticide to the hive.

Don't forget, careful spraying saves hives!

by Tom Turpin, Entomologist, Purdue University

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