Evaluation of fungicides and bio-control agents against stripe disease of barley caused by Drechslera graminea

Abstract

The stripe disease caused by Drechslera graminea (Telomorph- Pyrenophora graminea) is most devastating barley disease which constantly increasing in all major barley growing countries and causing mild to severe damage. The present experiment was carried out to evaluate the chemical as well as biological seed dressers to find out the most effective seed dresser to manage the stripe disease of barley. Among the chemical seed dressers tebuconazole 2% Ds @ 0.2 % was found best with minimum disease incidence (7.42%) and maximum grain (55.01q) as well as fodder (65.67q) yield. It was closely followed by seed treatment with combination of carboxin + thiram (1:1)75%WP @ 0.2 per cent (10.37,52.66 & 62.65) and lower dose of tebuconazole 2% Ds @ 0.1 % (11.53,51.29 &61.59 ) with per cent disease incidence, grain & fodder yield respectively. The bio-agents were found less effective as compared to chemicals, however, Trichoderma viride and T. harzianum proved good in efficacy as compared to other bio-agents.The cost benefit ratio was also recorded maximum in the best treatment tebuconazole 2% Ds @ 0.2 % (1:2.63) followed by carboxin + thiram (1:1)75%WP @ 0.2 per cent (1: 2.53).