Vol. 10, Issue 12 (2021)

Author(s):
Bhavana S, R Ganesha Naik, BK Shivanna and H Ravindra

Abstract:
Ridge gourd yellow mosaic virus (RgYMV) is one of the virus affecting the ridge gourd (Luffa acutangula). It is transmitted by whitefly Bemisia tabaci. Minimum of ten viruliferous whiteflies were required to transmit the virus. However, hundred per cent transmission of RgYMV disease was observed when 10 whiteflies were released per plant. Twelve hours of acquisition access period (AAP) and inoculation access period (IAP) were required for the whiteflies to transmit the disease. The percentage of transmission increased with increase in both acquisition and inoculation period. A pre-acquisition starvation period of 2 h ensured hundred per cent transmission and the whitefly retained the infectivity up to 5-8 days.