Spores in Dockage and Mill Fractions of Wheat Treated with Bacillus thuringiensis

Authors: McGaughey, Wm. H.; Dicke, Edwin B.; Finney, K. F.; Bolte, L. C.; Shogren, M. D.

Source: Journal of Economic Entomology, Volume 73, Number 6, 15 December 1980 , pp. 775-778(4)

Publisher: Entomological Society of America

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Dockage fractions of wheat treated with Bacillus thuringiensis Berliner contained more spores than whole wheat, but 75–85% of the spores remained on the wheat after cleaning. Tempering of the wheat prior to milling reduced viable spore counts by half. More spores were present on the outside layers of the wheat kernels than on the flour. Flour contained 1–5% of the initial number of spores, and bread baked from it contained few or no viable spores.

The B. thuringiensis content of the flour was too low to cause appreciable mortality among 3rd or later instars of the lndianmeal moth, Plodia interpunctella (Hübner), or the almond moth, Ephestia cautella (Walker), except when flour was produced from unblended treated wheat. Flour absorptions, bake mixing times, mixogram mixing times, other physical properties of the dough, and bread loaf volumes of flour from treated wheat were essentially the same as those for the controls. Thus, the B. thuringiensis treatments had no effect on the baking qualities of flour from treated wheat.

Document Type: Research Article

Publication date: December 15, 1980

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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