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为明确稻田常用农药对二化螟幼虫期优势寄生性天敌二化螟盘绒茧蜂Cotesia chilonis(Mat-sumura)的毒性,采用药膜法在室内测定了7种杀虫剂原药以及18种常用农药制剂对扬州、安吉、金华和乐清4个地区二化螟盘绒茧蜂雌成蜂的触杀毒性。结果表明,7种杀虫剂原药中氟虫腈、毒死蜱和三唑磷对该蜂毒性较高,杀虫单、吡虫啉和阿维菌素次之,氯虫苯甲酰胺则最低。12种杀虫剂制剂中20%氯虫苯甲酰胺悬浮剂和3种阿维菌素相关制剂对该蜂毒性相对较低,其余均具高毒性;4种杀菌剂中的异稻.三环唑对该蜂高毒,苯甲.丙环唑次之,井岗.蜡芽菌(井冈霉素)和盐酸吗啉胍.三氮唑核苷则毒性最低;2种除草剂中苄嘧.丙草胺毒性高于苄.二氯。此外,同一种药剂对不同地区雌蜂的毒性也有所不同。
In order to clarify the toxicity of common pesticides in paddy field to Cotesia chilonis (Mat-sumura), a dominant parasitic natural enemy against the second trimester of rice beet armyworm, seven pesticides and 18 species Toxicity of common pesticide formulations to female adult beetles of the resistance of Chilo suppressalis (Walker) in the four areas of Yangzhou, Anji, Jinhua and Yueqing. The results showed that the fipronil, chlorpyrifos and triazophos in the seven pesticides were higher toxicity to the bee, imidacloprid and abamectin, and the lowest was chlorantraniliprole. The toxicity of the 20% chloramphenicol suspending agent and 3 avermectin-related agents in 12 pesticide formulations was relatively low, while the rest were highly toxic. The four fungicides were heterotrimeric and tricyclic Azole was highly toxic to the bee, followed by benzofenazole, Jinggangling, Jinghua (Jinggangmycin) and morpholine guanidine hydrochloride with the lowest toxicity. Meloxicam is more toxic than benzyl dichloride. In addition, the same agent has different toxicity to female bees in different regions.