Abstract:

In order to clarify the occurrence pattern and infestation of pear psylla, and the trapping effect of yellow sticky board in the orchards of Korla and its surrounding areas, the number of adult pear psylla trapped was investigated regularly by five-point sampling method using yellow sticky board during the active period of adult pear psylla in 2021, and the occurrence dynamics of pear psylla was analyzed in that year. The rate of pear psylla infestation in the control orchard and the orchard with hanging yellow sticky board were investigated after the active period of pear psylla, and the prevention and control effects of yellow sticky board on pear psylla were compared and analyzed. After investigation, in the Korla area, the infestation of pear psylla mainly appeared in the shoot period, before and after the flowering period, and before fruit maturity. There were two insect peaks in one year, at the end of March and the end of April respectively. To early August, the quantity of pear psylla began to reduce significantly, and the infestation was almost through the whole growth period of pear trees. The results of yellow sticky board experiment showed that the active period of adult pear psylla was the key period of pest control, the rate of pear psylla infestation in treatment area was decreased by 43.76% compared with that of the control area, indicating that hanging yellow sticky board had substantial prevention and control effect on pear psylla infestation.

Key words: Korla, pear psylla, occurrence dynamics, damage rate, trapped by yellow sticky board