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Present paper reports induction of chitinases and β-1,3 glucanase in cucumber and chilli by the aqueous extract of the aerial parts of Azadirachta indica and Cleistanthus collinus. Efficacy of these extracts to induce the activity of chitinases and β-1,3 glucanase was concentration dependent. Similarly, magnitude of the enzyme activities also depended on the crop species and seedling part. Besides...