Eco-friendly management of stripe disease of barley (hordeum vulgare L.) by plant extracts and antagonistic fungi

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Author: 
Mredula Trivedi and Archana Singh
Abstract: 

A search for an environmentally safe and economically viable strategy for control of plant diseases has led to an increased use of plant based products in agriculture. To control the plant diseases, use of fungicides can impact the environment and human health. One method to eliminate these drawbacks is promoting induced protection. This study investigated the use of plants extracts and antagonistic fungi as a biological control of Drechslera graminea or as an inducer of protection in barley plant against the pathogen and also evaluated the possible mechanisms. In the controlled laboratory conditions leaf extracts of Azadirachta indica, Ricinus communis, Calotropis procera, Ocimum sanctum, Lawsonia rosea, Cassia tora and Crysanthemum indicum and native isolates of two fungal bioagents Trichoderma harzianum and T. viride were tested to examine their effectivity against D. graminea. Trichoderma sp. is an ecofriendly organism that does not cause any harmful and side effect on human beings and domestic animals when handled. Results demonstrated that Azadiracta indica followed by Ocimum sanctum were more effective as compare to remaining five ones against Drechslera graminea. Presence of plants extract seems to be affecting the normal growth of fungus. Trichoderma harzianum and T. viride were also effective against the fungal pathogen of stripe disease of barley. Trichoderma harzianum was found to be more effective than T. viride against Drechslera Graminea.

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