摘要
为筛选防治暗黑鳃金龟Holotrichia parallela的有效药剂,用浸虫法测定了7种药剂对暗黑鳃金龟幼虫的毒力,分别采用浸虫法、浸叶法、药膜法测定了7种药剂对其成虫的毒力,并通过大田试验作了进一步验证。浸虫法测得高效氯氟氰菊酯对成虫的毒力最高,LC50值为1.38 mg/L;浸叶法测得辛硫磷毒力最高,为42.05mg/L;药膜法测得毒死蜱毒力最高,为18.51mg/L。其中,高效氯氟氰菊酯毒力值变化最大,浸虫法毒力是浸叶法毒力的61.86倍;氯虫苯甲酰胺、氟虫腈在3种生测方法中毒力相当,但均较低。丁硫克百威对暗黑鳃金龟幼虫的毒力最高,LC50值为7.29 mg/L。田间试验结果显示,35%辛硫磷微囊悬浮剂4500 g/hm2(有效成分,余同)防效达80.66%,对花生的保果、增产幅度分别为77.90%、17.56%;30%毒死蜱微囊悬浮剂2 250 g/hm2、20%丁硫克百威乳油3000 g/hm2与辛硫磷防效相当,且显著高于其它药剂。因此,选用以上药剂于7月中下旬花生封垄前田间灌墩可以有效减轻暗黑鳃金龟为害。
Toxicity of seven insecticides to the white grub,Holotrichia parallela,was determined with insect-dipping test,and toxicity of seven insecticides to adults of H.parallela was also determined using insect-dipping test,glass-vial bioassay and leaf-dipping method to select effective insecticide,and field experiment was done at the same time.The result showed that the highest toxicity to the adult belong to cyhalothrin in insect-dipping treatment,phoxim with leaf-dipping method,and chlorpyrifos with glass-vial bioassay.Toxicity of cyhalothrin was significantly changed in different methods,and the relative virulence multiples of cyhalothrin with insect-dipping test was 61.86 times to that of leaf-dipping;chlorantraniliprole and fipronil had no significant change,but they had the lowest toxicities in every bioassay test.Carbosulfan had the highest toxicity to the white grub,and the LC50 was 7.29mg/L.The field experiment showed,in the seven different pesticides,the control effect against white grub was 80.66% when using 35% phoxim microcapsule suspension 4500g/hm2,the protection effect on peanut was 77.90%,the yield of peanut was increased by 17.56%.There were no significant difference compared with that of 30% chlorpyrifos aqueous capsule suspension 2250g/hm2 and 20% carbosulfan emulsifiable concentrate 3000g/hm2,but significantly higher than other pesticides.In the middle of July,one of the three inse-cticides can be chosen as the ideal pesticide against H.parallela in peanut field.
出处
《植物保护学报》
CAS
CSCD
北大核心
2012年第2期147-152,共6页
Journal of Plant Protection
基金
公益性行业(农业)科研专项(200903033)
关键词
暗黑鳃金龟
杀虫剂
毒力
药效
Holotrichia parallela
insecticide
toxicity
efficacy
作者简介
李杨，女1987年生，硕士研究生，研究方向为昆虫毒理学，email：lantian_2008_happy@163．com
通讯作者 （ Author for correspondence）, email ： muwei@ sdau. edu. cn ; Tel ： 0538 - 8242611
