Bacteria associated with eggs and first-instar larvae of the european corn borer: Isolation techniques and pathogenicity |
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Authors: | RE Lynch LC Lewis TA Brindley |
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Institution: | European Corn Borer Research, Agriculture Research Service, U. S. Department of Agriculture, Ankeny, Iowa 50021 USA |
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Abstract: | Egg masses of the European corn borer, Ostrinia nubilalis, were collected from caged corn plants to study the bacterial diseases of egg masses and first-instar larvae. In 1972, a reduction in the percentage hatch, indicative of a disease epizootic, was noted among the first-generation egg masses. Bioassays of the bacteria on first-instar larvae and egg masses showed that Bacillus thuringiensis var. kurstaki was pathogenic only to larvae. Bacillus megaterium was active primarily against the egg stage. |
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