Joint Action of Chlorfenapyr and Pyridaben against Tetranychus cinnabarinus Boisduval
YANG Zhenguo
XIE Daoyan
DA Aisi
NI Jing
Abstract：To investigate the joint acaricidal activities of chlorfenapyr and pyridaben,the acaricidal activi-ties of mixtures containing different proportion of chlorfenapyr and pyridaben against Tetranychus cinnaba-rinus Boisduval were measured via slide dipping,and the synergism was investigated by means of co-toxic-ity factor and co-toxicity coefficients( CTC) . The results indicated that the LC50 values of chlorfenapyr and pyridaben against T. cinnabarinus female adults were 8. 80 and 17. 69 mg/L,respectively. The best syn-ergistic effect was discovered in the ratio 49∶51 ,47∶53 and 45∶55 with the CTCs of 177 . 94 ,178 . 49 and 173. 73,respectively. The LC50 values of the three mixtures were 6. 65,6. 72 and 7. 00 mg/L,respective-ly,and the toxicities were 2. 66,2. 63 and 2. 53 times the toxicity of pyridaben,respectively. Therefore, chlorfenapyr ( 45%—49%) mixed with pyridaben ( 51%—55%) showed strong synergism against T. cinnabarinus female adults.
Keywords：Tetranychus cinnabarinusacaricidechlorfenapyrpyridabenjoint actionco-toxicity co-efficientco-toxicity factor
Publication Date：2015-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 88-92 )