Vol. 10, Issue 12 (2021)

Author(s):
K Sushma, T Nagalakshmi, K Arunodhayam, Syed Sadarunnisa and M Ramaiah

Abstract:
Ridge gourd [Luffa acutangula (L.) Roxb.], is an important vegetable crop which is originated in sub-tropical asian region including India, which is affected by several fungal, bacterial and viral diseases. Recently a new disease (Gummy stem blight) is causing severe losses to the cucurbitaceous crops in different regions of Andhra Pradesh. A roving survey was conducted to assess the occurrence of gummy stem blight disease in two districts of Andhra Pradesh viz., Y.S.R. Kadapa and Kurnool districts during 2020- 2021. Results of the field survey indicated that mean per cent disease index was observed to be 20.23 per cent and 13.42 per cent respectively in Y.S.R. Kadapa and Kurnool districts. Per cent disease index was recorded maximum in Lakshmigaripalli village with 46.00 per cent and minimum was recorded in Boyarevula village with 8.50 per cent. The pathogen associated with gummy stem blight disease was isolated and proved koch’s postulates. This is the first report of Didymella sp. causing gummy stem blight on ridge gourd in Andhra Pradesh