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By BIRGITT THORNHILL
Extension Agent. Agriculture
European Corn Borer
Several farmers have been in the Extension Office with questions in reference to the insect pest “European com borer.”
This insect attacks all parts of the com plant. The young worms feed on leaves in the whorl. Later they burrow into the stalk, tassel, cob, shank, and kernels. There can be two or three generations a year. Entomologists estimate that yield is reduced three to four percent for each first generation borer that matures in a com plant and l'/z to two percent for each second generation borer. The first generation causes stunted and broken plants, whereas the second causes dropped or shrunken ears and broken stalks.
Modern com hybrids have considerable tolerance to the com borer. The first nibble by the young borers
86.9%