the toxicity of biomite ® , gc-mite ® , oberon ® and envidor ® acaricides against sugarcane yellow mite, oligonychus sacchari (acari: tetranychidae)

the sugarcane yellow mite, oligonychus sacchari (mcgregor, 1942) is one of the most important pests of sugarcane. in this study, the acaricidal efficacy of four different acaricides including biomite ® , gc-mite ® , oberon ® and envidor ® was assessed under laboratory conditions at 28 ± 0.5ºc, 50 ± 5% rh and a photoperiod of 16:8 h (l:d). adults of o. sacchari were exposed to treated leaves of sugarcane, cp57-614 variety and the mortality was counted after 24 and 48 h of exposure. results indicated that for biomite ® the concentration of 1.5 lit/ha and in the case of gc-mite ® , 1 lit/ha was more effective against o. sacchari . there were no significant differences between the oberon ® and envidor ® after 24 h of exposure. however, the toxicity of oberon ® increased after 48 h time interval. lc 50 values of biomite ® , gc-mite ® , oberon ® and envidor ® were 1.01, 0.86, 0.99 and 1.73 lit/ha, respectively. application of acaricides can be effective tool for the control sugarcane yellow mite and it can be integrated with other control techniques.