THE EFFECTIVENESS EVALUATION OF BROAD SPECTRUM INSECTICIDES IN THE PEAR PSYLLA CONTROL

Abstract

Pear psylla Psylla pyri L. it is one of the main pests of pears worldwide. Decisions on the timing of preventive treatments and the choice of plant protection products used are made on the basis of regular monitoring of the stages of phytophagan development and taking into account the specifics of the action of insecticides on a particular stage of pest development. The article analyzes the range of insecticides allowed on pear against pear psylla, which is represented by preparations from 8 chemical classes. To reduce the resistance of pear psylla to the used pesticides, it is necessary to expand the range of broad-spectrum insecticides against this phytophagan. In this study, insecticides with larvicidal action, such as Voliam Flexi, SC, Lirum, SC, Lufox, EC, were tested in laboratory conditions. The characteristics of the used pesticides are given and the mechanisms of their action are described.Samples of annual pear growth were selected in the Prikuban zone of the Zakuban horticulture subzone of the Krasnodar region, Ust-Labinsk district. As a result of the study, it was found that the following pesticides have the best biological efficacy against nymphs (first-third age) of pear psylla: Voliam Flexi, SC with a consumption rate of 0.5 l/ha and Lirum, SC 1.5 l/ha. On the seventh day, they showed a maximum biological efficacy of 100 %, which was at the level of the standard preparation Movento Energy, SC. In this experiment, Lufox, SC had low efficacy, due to the fact that the drug has a longer mechanism of action, it takes 10-12 days for a good effect. We recommend using the data obtained in the case of registration of tested preparations for the control of pear psylla.