Biological effectiveness of hamla-550 ec against spider mite (Tetranychus urticae Koch) on apple orchard

Abstract

The article presents materials on the study of the effectiveness of Hamla-550 EC (a.v., Chlorpyriphos 50% + Cypermethrin 5% EC permeate common spider mite on an apple tree. The preparation was tested at a consumption rate of 1.0 l/ha. Ramboll high rates against thin spider mites on apple trees; biological effectiveness after treatment with the drug at a rate of 1.0l/ha was 74.6%; the maximum effect was observed on day 7 and amounted to 86.2%. Standard Nurel-D 55% fee at a rate of 1.0 l/ha showed a biological efficiency of not more than 75.8-70.8%.