Authors: REED, G. L.; BRINDLEY, T. A.; SHOWERS, W. B.

Source: Annals of the Entomological Society of America, Volume 65, Number 3, 15 May 1972 , pp. 658-662(5)

Publisher: Entomological Society of America

Abstract:

Host-plant resistance to surviving 1st-brood larvae of Ostrinia nubilalis (Hübner) was studied by feeding the larvae fresh tissue of corn leaf from 3 corn inbred lines. The lines (WF9 = susceptible, Oh43 = resistant, CI.31A = highly resistant) were tested at midwhorl and late-whorl stages of plant development. Mortality was higher among larvae fed resistant tissue and higher among larvae fed tissue from the mid-whorl stage. The percentages of larval death were linearly related to concentrations of DIMBOA (2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3-(4H)-one) in the tissue. Insects fed resistant tissue developed slower, weighed less, mated less successfully, and produced fewer egg masses than those fed susceptible tissue, but viability and size of the egg masses were not affected. Thus, insects fed susceptible late-whorl tissue produced 60 offspring for each offspring produced by insects fed highly resistant mid-whorl tissue.

Document Type: Research article

Publication date: 1972-05-15

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• Annals of the Entomological Society of America is published in January, March, May, July, September, and November. Annals especially invites submission of manuscripts that integrate different areas of insect biology, and address issues that are likely to be of broad relevance to entomologists. Articles also report on basic aspects of the biology of arthropods, divided into categories by subject matter: systematics; ecology and population biology; arthropod biology; arthropods in relation to plant diseases; conservation biology and biodiversity; physiology, biochemistry, and toxicology; morphology, histology, and fine structure; genetics; and behavior.
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