Effect of flupyradifurone, spirotetramat and thiacloprid insecticides on common pistachio psylla, Agonoscena pistaciae Burckhardt & Lauterer (Hem.: Psyllidae)

Common pistachio psylla, Agonoscena pistaciae, is the most important pest of pistachio orchards in Iran and reduce the quantity and quality of the product. In this study, the effects of Flupyradifurone 0.5, 0.75 and 1 ml L-1, Spirotetramat and Thiacloprid 0.5 ml L-1 and Flupyradifurone (0.5 ml L-1) with irrigation water were evaluated on nymphs and adult stages of A. pistaciae in Niriz region of Fars province. The number of nymphs and adult of A. pistaciae recorded in one day before until 3, 7, 10, 15, 20, 25, 30 and 40 days after chemical applications. The results showed that 3 days after treatment, different concentrations of Flupyradifurone and Thiacloprid have a good effect on the psyllid nymphs and the mean maximum of dead nymphs was in Thiacloprid. The mortality in Spirotetramat treatment on nymphs was increased in on the day 7 and the highest mortality occurred after 20 days. The mean number of the nymphs on treated trees with Flupyradifurone and Thiacloprid increased after 15 days of treatment. Efficacy of Spirotetramat increased after 7th day and the maximum efficacywas 99.44 percent on 20th day after treatment. The highest mean number of adult psyllid mortality was observed on day 3 after treatment in Flupyradifurone with concentration of 1 ml L-1. The efficacy of Spirotetramat on adults increased after 10 days post-treatment and the highest was occurred on 30 day of sampling (98.23). The results showed that Spirotetramat was effective in decreasing of the pistachio psylla population after 40 days of the insecticide application.