Abstract
Effect of different doses of aqueous extracts of Walnut leaf was studied on germinating seeds and early seedling growth of three Wheat varieties (cv. VL-738, VL-804 and VL-832) recommended for hills under West Himalayan agri-silvi system. Six treatments comprised of distilled water (Control =0%), 20%, 40%, 60%, 80% and 100% concentration of leaf extracts were treated. The effect of aqueous extracts was found inhibitive indicating a direct proportional relationship with concentration dependent manner on seed germination and subsequent seedling growth. Each variety exhibited extent of phytotoxicity at 100% extracts application in comparison to untreated control. Invariably there was a decrease in first count, germination, seedling root and shoot length, seedling fresh and dry weight and vigour index with increasing aqueous extracts concentration on germinating Wheat. However, the shoot length was observed maximum at 60% concentration for variety VL-804. Variety VL-804 showed more tolerance against Walnut leaf extracts and range of susceptibility to applied allelochemical among tested varieties was found in order of VL-738> VL-832> VL-804.
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