Degeneration of Potato Varieties Due to Virus Incidence in North Gujarat

Abstract

Abstract The physiological causes and viral disease infections are the two main reasons for potato degeneration. The seed potato diseased with viral diseases degenerated in the following successive generation therefore the investigation was carried out to evaluate the most popular potato varieties of Gujarat i.e. K. Badshah and K. Khyati against viruses and their subsequent degenerative effects on yield with comparison to fresh breeder seed. The three different treatments viz., T1: Fresh breeder seed every year, T2: Previous seed produce using seed plot technique, T3: Previous seed produce without seed plot technique were evaluated. The studies were conducted for four consecutive years during rabi 2017–2021. The result revealed significantly higher per cent plant emergence at 40 DAP was recorded in T1 (Fresh breeder seed every year) and T2 (Previous seed produce using seed plot techniques) in all years as compared to T3 (Previous seed produce without seed plot techniques). The per cent incidence of viral diseases at 75 DAP was recorded highest (mild mosaic:16.67%, severe mosaic: 17.67 and PLRV 21.83 in last year) in T3 i.e. Previous seed produce without seed plot techniques. Comparatively lower per cent incidence of viral diseases (mild mosaic:10.67%, severe mosaic: 7.33 and PLRV 13.33 in last year) was recorded in T2 i.e. Previous seed produce using seed plot techniques and the least incidence of viral diseases (Mild mosaic:1.83%, Severe mosaic: 1.67 and PLRV 1.67 in last year) was recorded in T1 i.e. Fresh breeder seed every year.