防治稻纵卷叶螟高毒农药替代药剂的室内筛选

 为筛选高毒农药替代药剂，采用Potter喷雾法测定了8类29种杀虫剂对广西南宁和江苏南京稻纵卷叶螟3龄幼虫的室内毒力。这8类杀虫剂的毒力顺序为：抗生素类杀虫剂≥苯基吡唑类杀虫剂≥噁二嗪类杀虫剂≥昆虫生长调节剂类杀虫剂≥有机磷酸酯类杀虫剂、拟除虫菊酯类杀虫剂≥有机氯类杀虫剂≥沙蚕毒素类杀虫剂。甲氨基阿维菌素苯甲酸盐（甲维盐）对两地区稻纵卷叶螟3龄幼虫的触杀毒力最高，其LC50值介于0.2~0.8 mg/L；氟虫腈、茚虫威、呋喃虫酰肼、丁烯氟虫腈、虫酰肼、氟啶脲和氟铃脲的LC50值介于1.8~53 mg/L。推荐对稻纵卷叶螟毒力最高的10种新型杀虫剂（甲维盐、依维菌素、阿维菌素、氟虫腈、茚虫威、呋喃虫酰肼、丁烯氟虫腈、虫酰肼、氟啶脲、氟铃脲）和一些有机磷杀虫剂（喹硫磷、辛硫磷、丙溴磷、毒死蜱、哒嗪硫磷）作为高毒农药替代的候选药剂进行大田药效试验。此外，还讨论了稻纵卷叶螟的药剂防治措施。

Laboratory Screening of Alternatives to Highly Toxic Insecticides Against the Rice Leafroller,Can phalocrocis medinalis

To screen alternative insecticides for controlling the rice leafroller, Cnaphalocrocis medinalis(Guenée), the toxicities of 29 insecticides belonging to 8 classes against the third instar larvae of the rice leafroller collected from Nanning City, Guangxi Zhuang Autonomous Region and Nanjing City, Jiangsu Province, China were measured by the Potter spraying method. The toxicity levels of the eight classes insecticides were as follows: antibiotic insecticides≥phenyl pyrazole derivative insecticides≥oxadiazine insecticides≥ insect growth regulator insecticides≥organophosphorus insecticides, pyrethroids insecticides≥organochlorine insecticides≥nereistoxin insecticides. Emamectin benzoate had the highest toxicity against the third instar larvae of the rice leafroller, with LC₅₀ ranging from 0.2 to 0.8 mg/L; while the LC50 of fipronil, indoxacarb, JS118, butylene fipronil, tebufenozide, chlorfluazuron and hexaflumuron were from 1.8 to 53 mg/L. Ten novel insecticides (i.e. emamectin benzoate, ivermectin, abamectin, fipronil, indoxacarb, JS118, butylene fipronil, tebufenozide, chlorfluazuron, hexaflumuron) and a few organophosphates (i.e. quinalphos, phoxim, profenofos, chlorpyrifos, pyridaphenthion) were recommended to further field trials. Furthermore, the management strategies of the rice leafroller were discussed.