Summary
Theδ-endotoxin fromBacillus thuringiensis subspecieskurstaki strain HD1-9 is almost 400 times more potent than theδ-endotoxin from strain HD-73 as a gypsy moth larvicide. The twoδ-endotoxins compete for a high-affinity binding site on the brush border membrane of larval gypsy moth midguts. The affinity for theδ-endotoxin from strain HD-73 is much greater than the affinity for theδ-endotoxin from strain HD1-9.
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Wolfersberger, M.G. The toxicity of twoBacillus thuringiensisδ-endotoxins to gypsy moth larvae is inversely related to the affinity of binding sites on midgut brush border membranes for the toxins. Experientia 46, 475–477 (1990). https://doi.org/10.1007/BF01954236
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DOI: https://doi.org/10.1007/BF01954236