A Study on the Chemical Control Methods to Coscinesthes salicis

Four chemical methods have good control effects to Coscinesthes salicis.Besmearing the trunk with the mixture,5% Cypepmethpin oil emulsion or 2.5% Bera-cyfluthrin oil emusion and diesel oil in the proportion of 1:50,may kill more than 80% of the eggs and newly hatched larvae.Using the mixture of 5% Cypepmethpin or 2.5% Bera-cyfluthrin oil emusion and diesel oil as smoke emission to control the adults,may kill 85% of the adults.The best time for this method is from early September to middle November.In addition,injecting chemicals to the trunk is an effective control method to all instar larvae.