Preliminarv Studies on the Toxicities of Acaricides to Tetranvchus cinnabarinus(Boisduval)by Potter Spray Tower Method
Zhao Jian and Tan Fujie(Department of Plant Protection,Nanjing Agricultural University,Nanjing 210095)
Toxicities of 6 pesticides including AgricuIturalAntibiotic Xin I,cyhalothrin,organonitrogen, and organophos-phorous acaricides(insecticides)to Tetranychus cinnabarinus(Boisduval)collected frorn Nanjing area were tested in the lab-oratory by potter spray tower. The results obtained indicatedthat sequence of toxicities is 40% Omethoate EC(LC_(50) :11.66ppm,A.I.)2.5%Cyhalothrin EC(22.34)20%Fen-propathrin EC (59.95)AgricuItural Antibiotic Xin I (83.4r/ml)20%Amitraz EC(126.83) 20.42%Kelthane EC(166.54).