TY - JOUR
T1 - Allelochemical induced stress
T2 - Effects of l-canavanine on the pathogenicity of Bacillus thuringiensis in Manduca sexta
AU - Felton, G. W.
AU - Dahlman, D. L.
N1 - Funding Information:
This investigation was supported in part by U.S. Department of Agriculture Agreement 59-2213-1-1-763-0. This paper is published as No. 83-7-197 of the Kentucky Agricultural Experiment Station, Lexington, Kentucky. We thank T. J. Neary for assistance in rearing the insects used in this study; and Dr. Davy Jones, Dr. G. A. Rosenthal, and Dr. G. L. Nordin who critically read the manuscript.
PY - 1984/9
Y1 - 1984/9
N2 - Increased susceptibility of Manduca sexta to commercial formulations of the microbial insecticide, Bacillus thuringiensis, as evidenced by lower LD50 and LT50 values, was observed when M. sexta were reared on an artificial diet supplemented with a sublethal concentration (2.5 mm) of l-canavanine. At several dosages of B. thuringiensis, which were administered either by diet contamination or by per os forced feeding, a greater than 70% reduction (P < 0.05) occurred in the LT50 response with canavanine-treated larvae. The LD50 values also were lowered by canavanine treatment. This constitutes the first report of a plant allelochemical enhancing the effect of B. thuringiensis in vivo. It is suggested that canavanine enhances the effect of B. thuringiensis on gut permeability and active transport.
AB - Increased susceptibility of Manduca sexta to commercial formulations of the microbial insecticide, Bacillus thuringiensis, as evidenced by lower LD50 and LT50 values, was observed when M. sexta were reared on an artificial diet supplemented with a sublethal concentration (2.5 mm) of l-canavanine. At several dosages of B. thuringiensis, which were administered either by diet contamination or by per os forced feeding, a greater than 70% reduction (P < 0.05) occurred in the LT50 response with canavanine-treated larvae. The LD50 values also were lowered by canavanine treatment. This constitutes the first report of a plant allelochemical enhancing the effect of B. thuringiensis in vivo. It is suggested that canavanine enhances the effect of B. thuringiensis on gut permeability and active transport.
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U2 - 10.1016/0022-2011(84)90011-9
DO - 10.1016/0022-2011(84)90011-9
M3 - Article
AN - SCOPUS:0001119491
SN - 0022-2011
VL - 44
SP - 187
EP - 191
JO - Journal of invertebrate pathology
JF - Journal of invertebrate pathology
IS - 2
ER -