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Published in Crop Sci 6:395-396 (1966)
© 1966 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Possible Causes of Resistance to the European Corn Borer1

Gene E. Scott, W. D. Guthrie and Carl L. Tipton2

The addition of both the "juice" and ether soluble "extract" from resistant to susceptible corn reduced larval survival to approximately half that found on plants treated with distilled water. These results indicate that at least a portion of the resistance of inbred CI31A, and of the single cross CI31A x B49, is caused by a feeding deterrent of toxic substance present in these plants. The addition of juice or extract from susceptible plants to resistant plants had no effect on larval survival.

1 Contribution from the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa, and the Crops and Entomology Research Division, ARS, USDA, cooperating. Journal Paper No. J-5286 of the Iowa Agr. and Home Econ. Exp. Sta. Project No. 1193.

2 Research Agronomist, Crops Research Division; Entomologist, Entomology Research Division; ARS, USDA; and Assistant Professor, Iowa State University; respectively.

Received for publication March 4, 1966.




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