摘要
在室内采用点滴法测定了几种杀虫剂和增效剂以不同比例混配对粘虫３龄幼虫的毒力及其增效作用。结果表明，３种供试药剂单用时对粘虫的毒力从大到小的顺序为辛硫磷＞丁硫克百威＞双甲脒，其ＬＤ５０值分别为每虫０．０１９６，０．０２６４和１．２２２μｇ；丁硫克百威分别与辛硫磷（１∶４）、双甲脒（１∶１）及增效剂ＰＢ（１∶１和１∶４）混用，辛硫磷分别与双甲脒（１∶１）和ＰＢ（１∶１）混配对粘虫均表现出较高的增效作用，其共毒系数分别为１４３．７、１５８．３８、１４８．００、１３７．５７、２３１．５２、１４３．１６和１５１．８６。
Bioassays were applied to estimate the toxicities of some insecticides and their
synergist against the third instar larvae of oriental armyworm, Mythimna separata Walker, in
the laboratory. The results showed that phoxim was the most toxic towards the insect, followed
by the other two insecticides carbosulfan and amitra. Their LD50 values were 0.0196, 0.0264
and 1.222 g per insect, respectively. High synergism was observed with the following mixtures:
carbosulfan plus phoxim (11and 14), carbosulfan plus amitra(11), carbosulfan plus PB(11 and
14), phoxim plus amitra(11), phoxim plus PB(11), and their cotoxicity coeffients were 143.70,
158.38, 148.00, 137.57, 231.52, 143.1 and 151.81 respectively. Besides, synergistic
mechanisms of binary mixtures of insecticides and their roles in the integrated resistance
management were discussed in this paper.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1999年第1期28-32,共5页
Journal of Huazhong Agricultural University
基金
湖南省农用化学品重点实验室资助
关键词
粘虫
丁硫克百威
辛硫磷
增效作用
杀虫剂
Mythimna separata Walker, carbosulfan,
phoxim, amitra, synergist (PB), binary mixture, synergistic action
