3-(1-Naphthyl)-2,5-diphenyl-2H-tetrazolium chloride was prepared from benzaldehyde-phenylhydrazone by coupling with 1-naphthylamine diazonium salt followed by oxidation with chlorine in 72%overall yield.
The most provocative aspect of this study is its original findings on the toxicity of diphenyl-pentenone(1,5-diphenyl-2-penten-1-one, DP) against the three kinds of aphids (Macrosiphum granarium Kirby, Lipaphis erysim...The most provocative aspect of this study is its original findings on the toxicity of diphenyl-pentenone(1,5-diphenyl-2-penten-1-one, DP) against the three kinds of aphids (Macrosiphum granarium Kirby, Lipaphis erysimi(kaltenbach), Schizaphis aurantiae(Fosc.)and the inhibitory effects of DP against detoxification enzyme system of the aphid (S aurantiae). The result of bioassay in the laboratory shows that the product has strong contact activity and very good antifeeding activity, with higher efficacy than anabasine and nicotine, two botanical aphidicides. The median lethal concentrations of the three products against the apterous adult (M granarium) are 175.85, 217.23 and 245.22 mg/L, respectively, at 24 h of pest treatment. DP is inferior to methomyl in contact assay but superior in antifeeding activity assay against the three aphides. DP has strong inhibitory effects on nonspecific esterases, carboxylesterase of aphid (S aurantiae), but it can not inhibit AchE. DP also has strong inhibitory effects on glutathione S-transferase of the aphid.展开更多
文摘3-(1-Naphthyl)-2,5-diphenyl-2H-tetrazolium chloride was prepared from benzaldehyde-phenylhydrazone by coupling with 1-naphthylamine diazonium salt followed by oxidation with chlorine in 72%overall yield.
文摘The most provocative aspect of this study is its original findings on the toxicity of diphenyl-pentenone(1,5-diphenyl-2-penten-1-one, DP) against the three kinds of aphids (Macrosiphum granarium Kirby, Lipaphis erysimi(kaltenbach), Schizaphis aurantiae(Fosc.)and the inhibitory effects of DP against detoxification enzyme system of the aphid (S aurantiae). The result of bioassay in the laboratory shows that the product has strong contact activity and very good antifeeding activity, with higher efficacy than anabasine and nicotine, two botanical aphidicides. The median lethal concentrations of the three products against the apterous adult (M granarium) are 175.85, 217.23 and 245.22 mg/L, respectively, at 24 h of pest treatment. DP is inferior to methomyl in contact assay but superior in antifeeding activity assay against the three aphides. DP has strong inhibitory effects on nonspecific esterases, carboxylesterase of aphid (S aurantiae), but it can not inhibit AchE. DP also has strong inhibitory effects on glutathione S-transferase of the aphid.
