Study On Field Efficacy And Laboratory Toxicity Of 24%Envidor SC Persistence On Citrus Red Mite(Panonychus Citri(McGregor))

This study through 24%Envidor SC's miticide to citrus red mite(Panonychuscitri(McGregor))on its ovicidal and adult stage in vivo laboratory and in fieldexperiments, obtained following test result.1 Laboratory Toxicity of 24%Envidor SC on citrus red mitein that: 24%Envidor SC had the good preventing and ontrolling effect to citrus red mite, but fast-acting was bad.(1) After applies drugs 3d, processes respectively to adult mite, ovicidalmite, only was: 11.0～18.0%, 5.2～6.5% and 15.8～22.0%.(2) This medicament was respectively prominent for ovicidal and adultfemale mite, after applies drugs 7d, but low effect to man adult mite, reach to:68.6～93.3%, 96.6～100% and 97.2～98.5%. after applies drugs 7d, 4000～6000 time ofsolution guards was only 2.2～69.9%, after but 24%EnvidorSC diluted 3000 time ofmedicines 15d still attainable 100%.2 3 provinces and 6 counties 24%Envidor SC preventing andcontrolling citrus red mite field efficacy experiment indicatedthat:(1) 24%Envidor SC independent employment, its fast-acting was bad, after3d, 24%Envidor SC was lower than 40% propargite EC 1000 times, 20% pyridabenEC1500 time, 40% propargite EC 1200 time, 10.5% pyridaben EC 1200 times of,15% pyridaben EC 1000 times. But it holds the effect to he good, after the medicine15～50d 24%Envidor SC each processing guards against the effect to be higher thanthe above conventional medicament the commonly used dosage. 24%Envidor SCsimultaneously has well kills the egg effect.(2) 24%Envidor SC with 20% pyridaben EC, 25% azocyclotin WP, 1.8%abamectin EC, 15% pyridaben EC mix with when, enhanced drug efficacy fast-acting, maintained held the effect. Therefore, in practical application, whenharms were serious, 24%Envidor SC mix with other medicament, when harm wasnot serious or occurs seriously may independent employment 24%Envidor SC, thedensity is about 4000 times for suitable.3 Research indicated to the secure observation that:24%Envidor SC processes respectively rightly.