Bug Scout 1981
Rootworm Beetles Have Arrived
(Tom Turpin, Entomologist, Purdue University)
Gee, these corn roots seem kinda weak to me.
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July 18, 1981

As predictable as the arrival of the swallows at Capistrano and the buzzards at Hinckley, Ohio, or the emergence of Punxsutawney Phil from his burrow on Groundhog Day is the return of rootworm beetles to Rutland, Ind.  Each year in late June and early July rootworm beetles begin emerging from the soil in cornfields across the Cornbelt.  Beetle emergence signals the completion of the larval life cycle.

The presence of rootworm beetles does not always mean that larval control measures have failed.  If beetles are present, a check of the corn roots in that field is suggested.  Damaged roots may mean that improved control of larvae might be needed.

Excessive numbers of beetles can interfere with pollination of the corn crop.  Remember, corn silks can be pollinated after they have been cut by rootworm beetles.  The presence of beetles does not automatically mean that spraying will be economical.

Rootworm beetles!  From Rolling Prairie to Rockport and from Raber to Rising Sun, they'll be there.

by Tom Turpin, Entomologist, Purdue University

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