RESULTS REGARDING THE CHEMICAL CONTROL OF THE SPECIES CYDALIMA PERSPECTALIS WALKER

Abstract

Cydalima perspectalis Walk. became one of the most dangerous pests of Buxussp., after hatching, the larvae are feeding without control with the leaves of this shrub, a powerful attack will lead to complete defoliation or even death of the host plant. For chemical control of this pest the following products were used: Calypso 480 SC 0,02% (Tiacloprid 480 g/l), Nurelle D 50/500 EC 0,2% (Cipermetrin 50 g/l + 500 g/l clorpirifos), Karate Zeon 0,2% (50 g/l lambda-cihalotrin), Mavrik 2 F 0,2% (Tau-fluvalinat 240 g/L).  The treatments occurred on 15.07.2019 in the "Al. Buia" Botanical Garden, the level of infestation at the treated plants was very high, development stage of the larvae being L4, L5 and L6. The evolution of effectiveness was monitored at 3, 7, 14 and 21 days. After the determination of frequency of the attack caused by Cydalima perspectalis, at the control variant by the frequency of attack is 90%. After applying the 4 treatments, the most efficient product in combating thispest prove to be Nurelle D 50/500 EC with 98,70% effectiveness, followed by Karate Zeon with 98.40%, Mavrik 2F with 98.10% and Fury 10 EC with 96.00% effectiveness.