استفاده بهینه از تله های زرد رنگ جهت مهار پسیل معمولی پسته Agonoscena pistaciae (Hem.: Psyllidae)

Although about 2,000 tons of various chemical pesticides are used annually against the common pistachio psyllid in pistachio orchards, this volume of pesticides has not yet been able to effectively reduce the population of this pest. On the other hand, with the dispersal of this pest into the orchards, controlling and preventing its damage becomes very difficult. Therefore, emphasizing the optimal use of non-chemical methods is of great importance. In this study, the optimal use of yellow sticky traps as one of the methods to control this pest was field-tested. The results showed that using these traps in the second half of April to combat the founding and overwintering generations before egg-laying, and using them on the outer edges of the orchard before the adult insects invade and disperse, significantly reduces this pest. Since this pest has 5 to 6 generations per year and due to the overlap of generations, it is not possible to optimally use yellow sticky traps throughout the growing season of pistachio trees. Therefore, they should be used against the founding and overwintering generations of this pest. To this end, an experiment was conducted on April 4 using a factorial design in the form of completely randomized blocks with 8 treatments and 3 replications in the village of Nasrabad, a suburb of Zarand County. The main levels included the outer edge of the orchard and the inner part of the orchard, while the sub-levels included the four cardinal directions. The results clearly showed a significant difference between the main levels, with the outer edge of the orchard having a mean of 18.8 and the inner part of the orchard having a mean of 3.58. Additionally, among the sub-levels, the treatments in the south of the orchard, with a mean of 28.16, had the highest pest capture compared to the north, east, and west directions, which had means of 0.33, 12.16 and 4.33 respectively.