摘要
为了探究低剂量杀虫剂与高温结合防控西花蓟马Frankliniella occidentalis种群的最佳组合,选用啶虫脒、多杀菌素、高效氯氰菊酯和灭多威4种杀虫剂的LC_(50)剂量处理西花蓟马成虫和2龄若虫18~76 h后,分别在41、43、45℃进行2 h热激处理,观察并记录每种组合下西花蓟马的存活情况。结果表明,药剂处理成虫或若虫18 h和28 h后再进行热激处理,西花蓟马的存活率显著低于其它处理。经4种杀虫剂的LC_(50)剂量处理后,不同高温热激均能不同程度降低成虫或若虫种群存活率,热激后存活率显著低于对照组;经灭多威LC_(50)剂量处理的成虫或若虫,再经高温热激处理后的存活率最低,其中45℃热激处理对成虫和若虫的存活率影响最明显,经45℃热激处理18 h和28 h后的成虫存活率为10.1%和5.9%,若虫存活率为6.1%和3.3%。研究表明,杀虫剂LC_(50)剂量与高温热激联合增强了对西花蓟马种群的抑制作用,药剂处理后选择最佳热激时间可最大限度降低西花蓟马的耐热性,进一步增强高温热激的防治效果。
To control western flower thrips Frankliniella occidentalis with the best combination of low- dose pesticide and high temperature, the adults and 2nd instar nymphs were exposed to 41, 43 and 45℃ for 2 h after treated with LCs0 doses of acetamiprid, spinosad, beta-cypermethrin and methomyl for 18- 76 h, and the survival rates were determined. The results showed that the heat-shock survival rates of adults and 2nd instar nymphs were lower at 41, 43 and 45 ℃ after treated with LCs0 doses of four insecti- cides for 18 h or 28 h than those of other treatments. The heat-shock survival rates of adults and 2nd in- star nymphs treated with methomyl were the lowest among all treatments, which had significant differ- ence at 41 ℃ and 43 ℃. The survival rates of adults were 10.1% and 5.9%, and the survival rates of 2nd instars were 6.1% and 3.3% after treated with methomyl for 18 h and 28 h at 45℃, respectively. The re- suits indicated that LCs0 doses of insecticides could improve the inhibitory effect of heat shock on F. oc- cidentalis populations, and the best interval time after pesticide treatment was very critical, which could decrease the heat resistance ofF. occidentalis and strengthen the control efficiency.
出处
《植物保护学报》
CAS
CSCD
北大核心
2017年第4期687-692,共6页
Journal of Plant Protection
基金
山东省现代农业产业技术体系(SDAIT-02-021-11)
国家自然科学基金(31372003)
山东省“泰山学者”建设工程专项
关键词
西花蓟马
低剂量
耐热性
热激存活率
Frankliniella occidentalis
sub-lethal dose
thermostability
heat shock survival rate
