Farklı İnsektisitlere Maruz Bırakılan Anthocoris nemoralis (Heteroptera: Anthocoridae)’in farklı Biyolojik Dönemlerindeki Av Tüketim ve Yumurta Açılış Oranındaki Değişiminin Belirlenmesi

Abstract

This research study has been carried out aimed to determine the prey consumption of different biological stages (3rd and 5th nymphal instars + male and female individuals) as well as the egg hatching ratios of the predatory bug, Anthocoris nemoralis (F.) (Heteroptera: Anthocoridae) of Cacopsylla pyri (Homoptera: Psyllidae), occurred at three different time periods (24, 48 and 72 hours) under four different insecticide (spinetoram, chlorpyrifos ethyl, diflubenzuron ve spirotetramat) treated conditions. According to the overall results of this research work, the average per day prey consumption (eggs of Ephestia kuehniella) rates of different biological stages of A. nemoralis in an insecticide treated environment was determined highest as 27.70% in female individuals and lowest as 18.44% in 3rd nymphal instars of the minute pirate bug. The highest prey consumption rate was noted in control (distilled water) treatments with 30.83% and the lowest (20.56%) was recorded in spirotetramat treated experiments when taken into account the average per day prey consumption rate of different biological stages depending on applied insecticides. The average prey consumption of biological stages of predatory bug correlated to different treated insecticides was found to be 27.81%. As a result of keeping A. nemoralis under insecticide treated environments for five days, it was observed that there was no egg hatching at the end of 1st day (24 hours) and 2nd day (48 hours), however, egg hatching rate increased to 21.71% at the end of 3rd day (72 hours), to 49.11% at the end of 4th day (96 hours) and to 58.11% on the 5th day (120 hours) after the conduction of research experiments. At the end of the 5th day, highest egg hatching rate (32.43%) was determined in control treatment followed by diflubenzuron with 30.35%, while the lowest egg hatching rate (14.70%) has been recorded in chlorpyrifos ethyl according to the average insecticide application.