植物源药剂对苜蓿蓟马的防效研究

Field tests of several botanical insecticides to control alfalfa thrips

选取7种植物源药剂与1种化学药剂(2.5%溴氰菊脂)对苜蓿蓟马Frankliniella occidentalis进行防治比较。结果表明,7种植物源药剂对苜蓿蓟马均有显著的防治效果,其中0.3%印楝素乳油、2.5%烟碱-楝素乳油、10%柠檬草乳油防效突出,与2.5%溴氰菊脂相比无显著差异,药后3 d的防效分别达到76.18%、63.42%和90.59%。此外0.3%印楝素乳油的药效持续时间长而10%柠檬草乳油的起效快。

Field tests of comparing seven botanical insecticides to one chemical insecticide showed that seven botanical insecticides gave significant control. Especially 0. 3% deltamethrin, 2.5%nicotinamide-azadirachtin and 10% lemongrasstin had excellent control not significant different compared to 2. 5% deltamethrim; 3 days after treatment, control level attained were 76.18 %, 63.42 %, 90. 59 % respectively.