25％JS7119乳油对桔全爪螨的生物活性和田间防效

摘要

测定25％JS7119乳油对不同虫态桔全爪螨的生物活性和田间防效.活性测定结果表明,25％JS7119乳油对桔全爪螨成虫的玻片浸渍法的致死中浓度(LC50)为115.921 7 mg/kg,大于对照药剂5％唑螨酯悬浮剂和15％哒螨灵乳油的致死中浓度；叶片浸渍法的LC50值为0.639 4 mg/kg,大于15％哒螨灵乳油的LC50,小于5％唑螨酯悬浮剂的LC50.25％JS7119乳油对桔全爪螨若虫和卵的叶片浸渍法的LC50值分别为4.478 3和644.391 7 mg/kg,均大于5％唑螨酯悬浮剂和15％哒螨灵乳油的LC50.田间防效测定结果表明,25％JS7119乳油625倍液对桔全爪螨速效性较好,持效期15d左右,与15％哒螨灵乳油1 500倍液的防效基本相当.%This experiment studied bioactivity and control effect of the 25%JS7119 EC for different developmental insect stages of Panonychus crtri(McGregor). The results of bioactivity assay showed that active compounds 25%JS7119 EC for Panonychus citri adults of the slide dipmethod, the median lethal dose (LC50) was 115.921 7 mg/kg. It was higher than the LC50 of the reference pesticides 5% fenpyroximate SC and 15% ridaben EC. The results of bioactivity assay showed that active compounds 25%JS7119 EC for Panonychus citri adults of the leaves-tip bioassays, the LC50 was 0.639 4 mg/kg . It was higher than the LC50 of the reference pesticides 15% ridaben EC. It was lower than the LC50 of the reference pesticides 5% fenpyroximate SC. The results of bioactivity assay showed that active compounds 25%JS7119 EC for Panonychus citri nymphs and egges apply the leaves-tip bioassays, the LC50 respectively was 4.478 3 mg/kg and 644.391 73 mg/kg. The LC50 of they both were higher than the reference pesticides 5% fenpyroximate SC and 15% ridaben EC. But the control effect of 25%JS7119 EC in field showed 25%JS7119 EC 625 times was better and more lasting to Panonychus citri the control effect of 25% JS7119 EC 625 times was equivalent to 15% ridaben EC 1 500 times, the practical results showed that 25% JS7119 EC have better control effect in field. It can be promoted the use of a large number of production in field.