Monosodium glutamate, a taste enhancer widely used in the food industry, was tested in the laboratory to determine its phagostimulatory effect on larvae of Choristoneura rosaceana (Harris). Larvae fed apple leaves treated with 50-700 µg/l monosodium glutamate increased leaf tissue consumption by approximately 40%. The stimulatory effect of monosodium glutamate (at 675 µg/l concentration) was maintained throughout 10 days of continuous exposure. Adding 675 µg/l monosodium glutamate to commercial formulation of Bacillus thuringiensis ssp. kurstaki, DiPel 2X DF, lowered LC50 from 450 to 150 µg/l (P<0.05, Lethal Ratio Significance Test), indicating good potential for monosodium glutamate to enhance activity of Bacillus thuringiensis- based formulations.
Species 1: Lepidoptera Tortricidae Choristoneura rosaceana (obliquebanded leafroller)
Keywords: feeding stimulant
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