Weed Management through Bio-herbicidal Activity of Rice Straw for Mitigating Herbicide Dependency

Prachi Rajput, Pasumarti Bhashkara Rao


Phyotoxicity related ecological significance of ten rice (Oryza sativa L.) varieties was evaluated under laboratory and greenhouse conditions against Avena ludoviciana Durieu. Basmati 370, Govind and VL Dhan 85 significantly (P<0.01) reduced seed germination and seedling dry weight in A. ludoviciana. Pot experiments exhibited a significant (P<0.01) reduction in height of A. ludoviciana with VL Dhan 85 and Govind. Proline accumulation was recorded with all varieties, whilst malondialdehyde with Govind and Pant Dhan 11. Ten phenolic acids viz., cinnamic, chlorogenic, benzoic, gallic, ferulic, p-hydroxybenzoic, salicylic, syringic and vanillic were identified and quantified from straw extracts of all ten rice varieties. Maximum seven phenolics were identified in Govind and VL Dhan 85 followed by Basmati 370 (six) whereas minimum in Pant Dhan 16 and Tarori Basmati (three each). These findings indicated the involvement of phenolics in phytotoxicity of rice straw, which could be utilized for developing natural compound based bio-herbicides to achieve sustainability in agriculture.


Allelopathy; Malondialdehyde; Proline; Phenolics; Phytotoxicity; Sustainable Agriculture


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