دراسة تشريحية و كيميائية لثمار نخيل التمر البذرية السليمة و المصابة بحلم الغبار (dust mite (Oligonychus afrasiaticus

Abstract EN

This study was condact in private orchard in Basra during the growing season 2014 to study some anatomical and chemical changes between infected fruits by dust mite (Oligonychus afrasiaticus ) and non infected fruits of date palm during different growth stages .The results showed that non infected fruits had a significant effect on thickness of exocarp layer and thickness of tannin layer ,which recorded (195.6,630 micrometer) as bellow, while it was (164 , 300 micrometer) in non-infected .

The tannin layers had got different shapes between non infected fruits and infected fruits ,it appeared as a continuous layers in all growth stages of non-infected fruits ,while it was appeared as discontinuous layer during growth stages of infected fruits .Also the chemical study showed a significant effect between infected and non-infected fruits in content of phenol ,the total soluble solids ,carbohydrate ,total titratable acidity and water content.