تفضيل بعض أصناف القمح لوضع بيض دبور الحنطة المنشاري الأوروبي Cephus pygmaeus

Abstract EN

Wheat stem sawfly (WSS), Cephus pygmaeus L.

(Hymenoptera: Cephidae), is an important pest of wheat and barley in many of the wheat producing regions around the world.

The aim of this study was to determine the preference of wheat verities (varying in morphological characters and phenological developmental stage) to the wheat stem sawfly oviposition under field cages infested with insects at two different time periods.

The experiment was conducted at the International Center for Agricultural Research in the Dry Areas (ICARDA), Syria.

The results showed that WSS females prefer laying their eggs in the stems of the tallest wheat varieties.

The bread wheat variety Suha-17/shuha18 was preferred for female oviposition when it was grown with varieties of similar height.

This cultivar was found to contain similar level of the compound isopropyl palmitate to that of the susceptible bread line NN25.

Also, the durum wheat cv.

Ammar-5, which was preferred for female oviposition, contains similar level of the compound 11-Tricosene to that of the susceptible durum wheat line 12167.

These compounds could be used as markers in screening wheat varieties for resistance to WSS.