تاثير فيروس واي البطاطا المحمول في درنات بعض اصناف البطاطا في انتاجيتها و في نسب انتقاله في درناتها

The effect of PVY borne in seeds of potato varieties: Penilla, Spunta,and Burien on its yield and PVY. Tuber transmission showed that the deferent treatments of secondary infection by PVY has: A negative effect with significant differences on the number of tubers, tubers weight, number of tubes > 40 mm, diameter of largest tuber, and the weight of largest tuber. No effect on the tuber weight, diameter of smallest tuber, and the weight of smallest tuber. Variation among rates of PVY seed transmission according to variation of treatments and potato varieties.