Abstract
Background: Inefficient and excessive use of inorganic fertilizers and pesticides causes environmental risks. Concurrent with the recent increase in agricultural productivity, agricultural systems are now also recognized to be a significant source of environmental damage. Chitosan is a biocompatible, biodegradable and nontoxic polymer with various applications. Methods: In the present investigation, the efficacy of Cu-chitosan nanoparticles (NPs) to plant growth promoting activity and antibacterial activity against bacterial pustule disease of soybean were evaluated. NPs treatments exhibited growth promoting effect in terms of plant height, root length, root weight, nodule number, weight of nodule and number of pods per plant in pot experiments. In field experiment, plant height, root length, root weight, nodule number, weight of nodule and number of pods per plant weight were enhanced in NPs treatments. Result: In control plants (water treated+inoculation) showed average disease severity 66.0%. All plants treated with 0.02 to 0.12% Cu-chitosan NPs showed significant antibacterial activity, express lower disease severity 50.0% to 33.3% and 55.3% to 34.0% in pot and in field condition respectively.
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