Use of clothianidin in pear psylla (Cacopsylla pyri L.) control in pear orchard

Abstract

Field trials were conducted during 2016 in order to investigate the efficacy of clothianidin (500 g a.i./kg in WP formulation) in control of pear psylla (Cacopsylla pyri L.) at two localities: Radmilovac and Begaljica near Belgrade, Serbia. Experiments have been conducted in accordance with standard EPPO method. Results of the field trials indicate good efficacy of clothianidin in pear psylla control on pear. The efficacy of clothianidin preparation at 0.035% concentration at the locality of Radmilovac was good (92.9-97.9%). Same preparation at 0.026% concentration had a significantly lower level of efficacy (82.27- 85.71%), and had the lowest efficacy at 0.017% concentration (53.5-57.5%). The efficacy of clothianidin preparation, at the locality of Begaljica at 0.035% concentration was also good (92-98.4%), while significantly lower efficacy (81.5-83.4%) was determined at 0.026% concentration. Very poor efficacy (56.3-58%) was achieved at the lowest concentration (0.017%).

Tokom 2016. godine ispitana je efikasnost klotianidina u suzbijanju obične kruškine buve (Cacopsylla pyri L.) izvođenjem poljskih ogleda u zasadu kruške na lokalitetima Radmilovac i Begaljica (opština Grocka, Beograd). Ogledi su izvedeni u skladu sa standardnim EPPO metodama. Rezultati ogleda ukazuju na visoku efikasnost preparata na bazi klotianidina (500 g a.s./kg u WP formulaciji) u suzbijanju obične kruškine buve u zasadu kruške. Efikasnost preparata na bazi klotianidina u koncentraciji od 0,035%, na lokalitetu Radmilovac, bila je visoka (92,9-97,9%). Isti preparat u koncentraciji od 0,026% imao je značajno nižu efikasnost (82,3-85,7%), a najnižu efikasnost (53,5-57,5%) ispoljio je u koncentraciji od 0,017%. Efikasnost klotianidina, na lokalitetu Begaljica, u koncentraciji preparata od 0,035% takođe je visoka (92-98,4%), dok je značajno niža efikasnost (81,5-83,4%) ispoljena pri koncentraciji od 0,026%. Veoma niska efikasnost (56,3-58%) ostvarena je primenom preparata u najnižoj koncentraciji od 0,017%.