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GENOTYPIC VARIATIONS  IN  YIELD  AND  QUALITY OF  WHEAT DAMAGED BY SUNN PEST (EURYGASTER SPP.)

ENGIN KINACI  AND  GULCAN KINACI

Abstract: Studies were  carried out to investigate the effects of sunn pest damage on thousand grain weight,  protein content  and sedimentation value  of  bread wheat (Triticum aestivum) genotypes  grown under natural sunn pest infestation during 1993-94, 1994-95, 1995-1996. Sunn pest damage varied among wheat genotypes. Thousand grain weight, protein content and sedimentation values were decreased significantly as sunn pest damage increased. Decrease in thousand grain weight, protein content and sedimentation value  due to sunn pest damage recorded was 17.7, 18.2 and 77.2%, respectively. Wheat genotypes with hard red grains were less affected  from sunn pest damage than soft white grains. Results of this research demonstrate the existence of substantial variation among wheat genotypes in the damage due to sunn pest that gives opportunity for selection of  less damaged wheats which can be grown directly for production and use in wheat breeding programmes to improve resistance against sunn pest.                 

Department of Field Crops, Faculty of Agriculture, Eskişehir  Osmangazi Üniversity,  Eskişehir,  Turkey