Vol. 11, Issue 3 (2022)

Author(s):
Manthesha HD, Dr. Mallikarjun Kenganal, Dr. Yenjerappa ST, Dr. Aswathanarayana DS and Dr. Vikas Kulkarni

Abstract:
Onion (Allium cepa L.) is an important vegetable crop grown around the world. Twister disease is one of the recently noticed threat in onion cultivation around many parts of Karnataka. Keeping this in view, a comprehensive and systematic roving survey was conducted by using GPS coordinates during rabi 2020-21 in the farmer’s field at six districts of Kalyana-Karnataka region viz., Ballari, Bidar, Kalaburgi, Koppal, Raichur and Yadgir to know the status of severity of onion twister disease. The obtained results from roving survey revealed that disease severity ranging from no disease to 77.65 per cent across the surveyed villages of different plots. Maximum mean disease severity was recorded in the Koppal district 44.50 per cent. Whereas, Raichur district recorded the least disease severity 22.88 per cent. Among all the taluks surveyed, Yelburga taluk of Koppal district recorded the highest disease severity of 52.34 per cent, followed by Bidar taluk of Bidar district (44.20%). Whereas, Kudligi taluk of Ballari district recorded the lowest disease severity of 18.09 per cent.