تقويم قابلية بعض أصناف الشعير المزروع و السلالات الاختبارية المبشرة في سورية للإصابة بذبابة تدرن ساق الشعير Mayetiola hordei Keiffer.

الملخص EN

This study was conducted at three agricultural research stations in Aleppo province: Yahmol station (56 km north of Aleppo, rainfall 420 mm), Tel-Hadya station (38 km southwest of Aleppo, rainfall 335 mm), Hmaimah station (55 km east of Aleppo, rainfall180 mm), to evaluate the susceptibility of some barley local varieties and promising experimental lines to infestation with barley stem gall midge Mayetiola hordei Keiffer under natural conditions during 2009/10 and 2010/11 growing seasons.

The susceptibility to infestation was measured on the basis of infestation rate and infestation severity.

Results showed that all tested varieties and lines, were infested with barley stem gall midge, with significant differences in infestation rate and severity among some of them.

The range of infestation rate in 2009/10 season was 2.2-22.2% at Yahmol station, 4.4- 71.11% at Tel Hadya station and 5.7-32.5% at Hmaimah station.

The genotype WI/Tad revealed high susceptibility with infestation rate at Tel-Hadya station of 71.1% and 43.1%, during the 2009/10 and 2010/11 seasons, respectively, whereas Furat-5 had the lowest infestation rate and severity, at the three stations in both seasons.

The highest infestation severity was 13.36 insects/plant recorded on S-6137 at Tel-Hadya station during the 2009/10 growing season