螺虫乙酯对烟粉虱的防治效果评价

采用室内毒力测定与田间试验相结合的方法,研究了螺虫乙酯（Movento）对烟粉虱的防治效果。室内毒力测定结果表明：96 %螺虫乙酯原药对烟粉虱卵和若虫都具有非常高的杀虫活性,LC50分别为18.91 mg?L-1和14.97 mg?L-1,与对照95 %吡虫啉没有显著差异|但对烟粉虱成虫的杀虫效果并不十分理想,LC50达到了453.34 mg?L-1,且显著高于对照95 %吡虫啉。田间试验结果表明：24 %螺虫乙酯悬浮剂（SC）对烟粉虱有良好的防效和持效性,且螺虫乙酯与Biopower（助剂）混用的防效明显优于螺虫乙酯单独使用的效果|螺虫乙酯与0.2 %〔0.24 g?（667 m2）-1〕Biopower混用,药后1～28 d对烟粉虱的防效分别为64.91 %～66.92 %、82.00 %～82.59 %、88.11 %～89.97 %、89.99 %～93.94 %和91.10 %～93.56 %。     

螺虫乙酯悬浮剂对苹果绵蚜防治效果

以10a生苹果树为试材,研究240g/L螺虫乙酯悬浮剂、500g/L啶虫脒水分散粒剂对苹果绵蚜防治的防治效果。结果表明:螺虫乙酯防治绵蚜效果较好,持效期较长,可达35d,建议生产中选用240g/L螺虫乙酯悬浮剂3 000倍液防治苹果绵蚜。     

甜椒中螺虫乙酯主要代谢产物及残留量膳食摄入评估

为了研究甜椒中螺虫乙酯主要代谢物的转化情况、施药措施与残留量的相关性,以及残留量膳食摄入评估,利用建立的螺虫乙酯及其4个主要代谢物的高效液相色谱三重四极杆串联质谱法,对施用过螺虫乙酯的甜椒样品进行检测分析及膳食摄入评估.结果表明,甜椒中螺虫乙酯及其4个主要代谢物的平均回收率为89％～107％,相对标准偏差为1.2％～4...     

Movento, an innovative ambimobile insecticide for sucking insect pest control in agriculture: Biological profile and field performance

The tetramic acid derivative spirotetramat (brand name Movento^®), has shown an outstanding performance against sucking insect pests in laboratory and greenhouse assays as well as in semi-field and field trials. The product acts as an inhibitor of lipid biosynthesis and affects juvenile stages with additional effects on adult fecundity. There is no cross-resistance to any other insecticide. After foliar application spirotetramat penetrates through the leaf cuticle and is translocated as spirotetramat-enol via xylem and phloem, up to growing shoots and down to roots. This full ambimobility or two-way systemicity (phloem and xylem transport) ensures the control of hidden and soil living sucking pests after foliar application and protects new shoots. The worldwide field development of spirotetramat in Bayer CropScience AG resulted in numerous uses against many species of whiteflies, aphids, scales (soft and armoured scales), mealy bugs, psyllids and selected thrips species in vegetables, cotton, soybean, pome and stone fruit, grapes, hop, citrus, nut trees and banana. The new mode of action renders spirotetramat as an excellent rotation partner with existing products for the management of aphid, whitefly and psyllid populations, which are frequently resistant to conventional insecticides. Moreover, only low adverse effects have been found on beneficial arthropods, which make the product suitable for modern integrated pest management (IPM) systems. These unique properties contribute to safeguarding the crop yield potential both in quality and quantity. In this paper, the new chemistry is presented, compared with standard insecticides and novel applications in IPM systems are discussed.     

螺虫乙酯及其四种代谢产物在柑橘中的消解代谢和残留规律研究

为对螺虫乙酯及其四种代谢产物的消解残留和代谢行为做出科学评价。利用液相色谱串联质谱研究了一年三地螺虫乙酯及其四种代谢产物在柑橘中的消解动态、最终残留和代谢行为。螺虫乙酯及其代谢产物在柑橘中的添加回收率为71.4%~107.1%。相对标准偏差在0.5%~7.28% 之间,最低检出浓度均为0.02mg/kg,降解半衰期为1.74~5.83d,螺虫乙酯-烯醇、螺虫乙酯-酮羟基、螺虫乙酯-烯醇-吡喃葡萄糖在螺虫乙酯代谢行为中均有不同程度检出。按照推荐剂量的1.5倍施药3次,21 d后柑橘中螺虫乙酯及其代谢物残留量均小于MRL值(1 mg.kg -1),收获的柑橘可以食用。应注重代谢产物对生态环境的影响。     

24%螺虫乙酯悬浮剂对烟粉虱成虫的田间药效试验

为明确24%螺虫乙酯悬浮剂对烟粉虱成虫的防治效果,进行了田间药效试验。试验结果表明,24%螺虫乙酯悬浮剂对烟粉虱成虫具有良好的防治效果,药后7 d,24%螺虫乙酯悬浮剂2 000倍液防效最佳,为82.37%,且药后28 d,其仍能保持44.41%的防效,与常规用药40%啶虫脒水分散粒剂3 000倍液相比,其速效性稍弱,但持效性良好。田间应用时,推荐配合啶虫脒使用。     

24％螺虫乙酯SC对苹果瘤蚜的田间药效及持效期研究

[目的]了解24％螺虫乙酯SC对苹果瘤蚜的防治效果,为合理使用螺虫乙酯防控苹果瘤蚜提供理论依据.[方法]以3年生红富士果树为试材,研究24％螺虫乙酯悬浮剂对苹果瘤蚜的防效、用药剂量、持效期以及对苹果的安全性.[结果]24％螺虫乙酯悬浮剂5 000倍稀释液对苹果瘤蚜有较好的速效性和持效性,持效期达20d以上,药后15-21 d的防效达98％以上,显著高于2.5％溴氰菊酯乳油500倍稀释液和10％吡虫啉WP2 000倍稀释液的控制作用.[结论]24％螺虫己酯悬浮剂在苹果瘤蚜等蚜虫防治上具有较高的推广应用价值.     

螺虫乙酯240g／L悬浮剂高效液相色谱分析方法研究

本文采用高效液相色谱法,以乙腈＋0．1％醋酸水溶液为流动相,使用XTerra RP18、5μm为填料的不锈钢柱和二极管阵列检测器,检测波长240nm。结果表明,该方法测得螺虫乙酯的标准偏差为0．09,变异系数为0．41％,线性相关系数为1,平均回收率为100．54％。