Impact of Abiotic Factors on Population Fluctuations of Citrus psylla (Diaphorina citri) in Faisalabad (Pakistan)

Citrus psylla (Diaphorinacitri) is sap sucking bug that is belonging to family Psyllidae and having the order is Hemiptera. It has become one of the potential pests of citrus orchards in Pakistan. Its nymph sucks the cell sap and produce honeydew, while on the other hand adults are carrier of greening disease in citrus plant. Data was collected from 10 plants selected randomly from an acre field. Nymph population was scouted on twig basis from the four sides of plants. Adult population was scouted by sweeping the Arial net across the four geographical sides of the plant. Minimum and maximum temperature of a day was found negatively correlated but highly significant to the nymph population of citrus psylla .Relative humidity of evening and morning of a day is also significant. Maximum and minimum temperature of a day was found to be highly significant and relative humidity of evening and morning was found to be negatively correlated but highly significant to the adult population. Rainfall was found to be insignificant for both Adult and Nymph population.