Spirotetramat metabolizes to its active enol form in the plant. We described here a photocaged pesticide delivery system that can release insecticidal spirotetramat enol form upon light irradiation. Covalently linking...Spirotetramat metabolizes to its active enol form in the plant. We described here a photocaged pesticide delivery system that can release insecticidal spirotetramat enol form upon light irradiation. Covalently linking spirotetramat-enol with photoresponsive coumarin generated the caged insecticide. The photophysical and photochemical properties, deprotection photolysis and insecticidal activities of the caged spirotetramat enol were studied. This light-triggered system can undergo cleavage to release free spirotetramat enol form at the presence of blue light （420 nm） or sunlight, Bioassays indicated that the triggered molecule has no obvious insecticidal activity against Aphis craccivora Koch at dark and could be activated by light to release the insecticidal ingredients, which provides precise control over insecticide delivery.展开更多
螺虫乙酯是由拜耳公司开发生产的季酮酸类杀虫杀螨剂,该药剂可以在植物木质部和韧皮部双向内吸传导。使用该药剂对梨木虱Cacopsylla chinensis Yang et Li的田间防治结果表明,240 g/L螺虫乙酯悬浮剂在整个试验期间表现为速效性较低,但...螺虫乙酯是由拜耳公司开发生产的季酮酸类杀虫杀螨剂,该药剂可以在植物木质部和韧皮部双向内吸传导。使用该药剂对梨木虱Cacopsylla chinensis Yang et Li的田间防治结果表明,240 g/L螺虫乙酯悬浮剂在整个试验期间表现为速效性较低,但持效性很好。稀释2 000倍、3 000倍和4 000倍处理区的防效在施药后第28天均达89%以上,施药后第91天防效保持在81%～89%,明显高于常规药剂甲氰菊酯、溴氰菊酯、吡虫啉和甲氨基阿维菌素苯甲酸盐处理区的防效。研究表明,田间1次施药可以控制梨树整个生长季节内梨木虱的发生危害。展开更多
基金financially supported by the National Natural Science Foundation of China (Nos. 21472046, 21372079)Science and Technology Commission of Shanghai Municipality (No. 16391902300)the Fundamental Research Funds for the Central Universities (No. 222201718004)
文摘Spirotetramat metabolizes to its active enol form in the plant. We described here a photocaged pesticide delivery system that can release insecticidal spirotetramat enol form upon light irradiation. Covalently linking spirotetramat-enol with photoresponsive coumarin generated the caged insecticide. The photophysical and photochemical properties, deprotection photolysis and insecticidal activities of the caged spirotetramat enol were studied. This light-triggered system can undergo cleavage to release free spirotetramat enol form at the presence of blue light （420 nm） or sunlight, Bioassays indicated that the triggered molecule has no obvious insecticidal activity against Aphis craccivora Koch at dark and could be activated by light to release the insecticidal ingredients, which provides precise control over insecticide delivery.
文摘螺虫乙酯是由拜耳公司开发生产的季酮酸类杀虫杀螨剂,该药剂可以在植物木质部和韧皮部双向内吸传导。使用该药剂对梨木虱Cacopsylla chinensis Yang et Li的田间防治结果表明,240 g/L螺虫乙酯悬浮剂在整个试验期间表现为速效性较低,但持效性很好。稀释2 000倍、3 000倍和4 000倍处理区的防效在施药后第28天均达89%以上,施药后第91天防效保持在81%～89%,明显高于常规药剂甲氰菊酯、溴氰菊酯、吡虫啉和甲氨基阿维菌素苯甲酸盐处理区的防效。研究表明,田间1次施药可以控制梨树整个生长季节内梨木虱的发生危害。
