الطفيلان Trechnites psyllae (RUSCH.)‎ و Prionomitus mitratus (DALM.)‎ كمتطفلين على حشرة بسيلا الأجاص Cacopsylla pyri في بلغاريا

Abstract EN

Trechnites psyllae (DALM.) and Prionomitus mitratus (RUSCH.) (Hymenoptera: Encyrtidae), were found to parasitize the nymphs of pear sucker Cacopsylla pyri (Hemiptera: Psyllidae) as the first registration in the region of Plovdiv, southern Bulgaria.

The developmental time from egg to adult was studied under laboratory conditions at two constant temperatures (24 oC and 28 oC) and photoperiod (L18: D6) in an incubator where heat and light were controlled, the heat was controlled by a thermometer at ±1o C accurate level.

At 24o C, females of T.

psyllae completed its development in 22.6 days and males in 19.8 days, whereas at 28 o C, it took 15 days for females and 14 days for males.

In respect to P.

mitratus, the females and males completed their development in 24.5 and 22.6 days, respectively at 24o C, whereas both sexes failed to complete their development at 28o C.

28o C seems to be upper development threshold for P.

mitratus.

Females of both species developed slightly slower, compared to males.

Morphological characteristics of males and females of both parasitoid species were presented.