Laila Aldahak^*(1) Bashar AL sheikh ⁽²⁾ Ahmad Elkhalf ⁽³⁾ and Feras Mhamed Asaad ⁽⁴⁾

• Department of Field Crops, College of Agriculture Engineering, Hama University, Salamiyeh, Hama, Syria.
• Department of Plant Protection, College of Agriculture Engineering, Hama University, Salamiyeh, Hama, Syria
• Al Raqa Research Center, General Commission for Scientific Agricultural Research GCSAR, Damascus, Syria.
• Hamah Research Center, General Commission for Scientific Agricultural Research GCSAR, Damascus, Syria.

(*Corresponding author: Dr. Laila Aldahak. E-Mail: laila.dahak@hama-univ.edu.sy ; laila.dahak@gmail.com).

Received: 13/09/2020        Accepted: 19/08/2020

Abstract

This research conducted during the growing season of 2019/2020 in Soran region, northern of Hama, about 18 km, this research aimed to evaluate the resistance of several approved wheat varieties in Syria to wheat stem sawfly (WSS), considering this one of the effective ways to resist this pest within the natural conditions in Hama Governorate. The results showed wide disparate levels of infection. Among the tested durum wheat varieties, females of the wheat stem sawfly were more likely to lay their eggs in the stems of this specific durum wheat type (Cham 5), which was susceptible to infestation, followed by (Cham 9). The stems these two varieties characterized by the highest height in the early spread stages of wasps, and not the least developed in late stages, while the rest of the tested cultivars distinguished by their resistance to infection. Speaking of the soft wheat, female wasps preferred to lay their eggs in the variety stem (Douma 2) and the reasons for this preference were unknown. Although (Douma 2) distinguished by their height, but without any significant differences with other varieties during the early appearance of wasps, while its plants were the most developed during the late period of wasp’s dispersal. The rest of the tested varieties of soft wheat distinguished by their resistance, as an indicator of the variety’s resistance.

Key words: wheat stem sawfly, Soft wheat, Durum wheat, Phenological stages.

Full paper in Arabic: PDF