The Synergistic Activity of Combination of Different Pesticides against Meloidogyne incognita(Root-Knot Nematode)
XIAN Zhen-hua;WANG Yu-sha;AI Hui-jian;SHANG Zhan-feng;ZHOU Jun-jing;WEI Liu-li;Agricultural College,Guangxi University;
[Aims]The study aims to screen out the optimal pesticide agianst Meloidogyne incognita with high efficacy and low poison.[Methods]Dipping method was conducted to test the toxicity of 9 pesticides,after the screening,high active pesticides were mixed to test the joint toxicity.[Results]Emamectin·benzoate had the highest toxicity against the second-stage juveniles(J2) and eggs with LC(50) of 2.51,10.50 mg/L,respectively.The co-toxicity coefficient of emamectin·benzoate mixed with fosthiazate was 141.59,the cotoxicity coefficient of avermectin mixed with fosthiazate was 159.37.[Conclusions]The activity of emamectin·benzoate is the highest among the nine tested pesticides,the activity of fosthiazate mixed with avermectin or with emamectin benzoate are the best among all the mixtures.