论文部分内容阅读
豆野螟 Maruca testulalis Geyer(1832)是上海地区豆类蔬菜尤其是豇豆 VignaSesguipedalis 的主要害虫,一年发生4—5代,以第2—3代为害7—8月份的中、晚茬豇豆为主。害虫主要产卵于豇豆鲜花,产卵期与豇豆开花期吻合,幼虫在豇豆花、荚间多次转移为害。药剂防治适期为开花盛期,喷药时间以早晨8时前花瓣张开时为宜。20%杀灭菊酯、10%氯氰菊酯、2.5%溴氰菊酯等拟除虫菊酯杀虫剂是当前防治豆野螟的高效药剂,对幼虫和卵具有良好的杀伤效果。每亩用量为25—35毫升,以花为主要施药对象均匀喷雾,隔10—15天喷一次,一茬豇豆喷二次(在害虫发生期长,发生量大时喷三次),能有效控制为害,明显提高豇豆的品质和产量。
Bean Beetles Maruca testulalis Geyer (1832) is a major pest of beans and vegetables in Shanghai, especially the cowpea VignaSesguipedalis, occurs 4-5 generations a year, with 2-3 generations of harm 7-8 months in the middle and late stubble cowpea-based . Pests mainly spawn in the cowpea flowers, spawning period and cowpea flowering coincide, the larvae in the cowpea flowers, pod multiple transfer damage. Medicament suitable for the flowering period, spray time to petal open before 8:00 is appropriate. Pyrethroid insecticides, such as 20% fenvalerate, 10% cypermethrin and 2.5% deltamethrin, are the most effective pesticides against bean borer and have good killing effect on larvae and eggs. Per acre amount of 25-35 ml, the flowers as the main spray evenly spray objects, spraying once every 10-15 days, a stubble cowpea spray twice (in the pest occurrence period, the amount of large spray three times), can be effective Control damage, significantly improve the quality and yield of cowpea.