دراسة أولية على حشرة بسيلا الفستق الحلبي agonoscena targionii (Licht.)‎ (psyllidae : homoptera)‎ و أعدائها الحيوية في بعض المناطق السورية

Abstract EN

An ecological study was conducted, during 1994.

on the pistachio psyllid, Agonoscena targionii (Licht.) (Psyllidae : Homoptera) in four regions in Syria.

The percentage of infestation with the pest had reached 100% in all regions but at different times; as 100% infestation was reached On May 1st, July 10, July 24 and August 7 in A1-Muselmiya, Jarablus, A1-Bab and Morek, respectively.

The pest occurred between the I st week of April to the end of October with a peak abundance during the I week of May in A1-Muselmiya, 4th week in AL-Bab, 3rd week in Jarablus and the 4th in Morek, respectively.

Pistachio psyllid overwintered as adults under bark and in cervices of pistachio trees for 5 month, from the end of October to the end of March.

Many beneficial insects were found in pistachio orchards in Syria, as natural enemies of A.

targionii.

The 4th and 5th nymph instars were attacked by a dipteran endoparasitoid.

Rate of parasitism ranged from 1.2 to 85% in all regions under field