联苯菊酯等6种农药对柑桔木虱成虫室内毒力测定及田间药效试验

Field Control Experiments and Toxicity of 6 Pesticides to Asian Citrus Psylla (Diaphorina citri Kuwayama)

为了筛选到更多防治柑桔木虱成虫的有效药剂,于2008年采用点滴法测定了6种农药对其成虫的室内毒力,活性最高的是丁硫克百威(LC50=4.1mg/kg),其次分别是稻丰散(LC50=44.3mg/kg)、联苯菊酯(LC50=44.3mg/kg)、吡虫啉(LC50=60.1mg/kg)和喹硫磷(LC50=73.5mg/kg),最差的是甲基嘧啶磷(LC50=192.8mg/kg)。田间药效试验结果表明,增效联苯菊酯EC25.00,16.67,12.50mg(a.i)/kg药后24h,3,7天的防效达100%;喹硫磷EC250mg(a.i)/kg、稻丰散EC500mg(a.i)/kg、333mg(a.i)/kg、增效丁硫克百威EW200mg(a.i)/kg药后24h的防效>95%;甲基嘧啶磷500mg(a.i)/kg的防效低于80%。增效丁硫克百威EW200mg(a.i)/kg的防效高于丁硫克百威EC250mg(a.i)/kg的防效。

Citrus psylla （Diaphorina citri） has become the most important pest in Huanglongbing （HLB） areas. Up to now; the assay was yet not reported. By means of dipping, the laboratory toxicity of 6 pesticides to adult psylla was conducted out in 2008. The LC50 of carbosulfan, phenthoate,bifenthrin,imidacloprid, quinalphos,Pirimiphos-methyl was 4.1mg/kg, 44.3 mg/kg, 44.3 mg/kg, 60.1 mg/kg, 73.5 mg/kg, 192.8 mg/kg, respectively. After treating of 24 h, 3d and 7 d, the adult psyllid field control efficiency of bifenthrin plus azone 12.5 mg （a.i）/kg was all 100%. the adult psyllid control efficiency of phenthoate 333 mg（a.i）/kg,quinalphos 250 mg（a.i）/kg, carbosulfan plus azone 200（a.i）/kg was all over than 95%, while that of pirimiphos-methyl 500 mg（a.i）/kg less 80%. The adult psyllid field control efficiency of carbosulfan plus azone 200（a.i）/kg was better than that of carbosulfan 250（a.i）/kg.