Comparative study finds that chitosan nanoparticles significantly reduce leaf infestation in wheat, suggesting their potential as natural fungicides.
A comparative study of fungistatic and elicitor activity of chitosan solutions and dispersions of chitosan nanoparticles obtained by fractional precipitation at pH 5.0 (NC-5) and pH 7.0 (NC-7) from chitosan with a molecular weight of 60 kDa was carried out. Both dispersions demonstrated higher fungistatic activity against Bipolaris sorokiniana compared to chitosan solution. A tendency towards a greater effect of inhibition of B. sorokiniana mycelium growth was revealed for NC-5 dispersion compared to NC-7 dispersion. It was found that pretreatment of wheat plants with NC-5 and NC-7 dispersions reduced leaf infestation with dark brown spot by three and two times, respectively, compared to the control. Chitosan solution under the same conditions suppressed disease development by only 10%. The studied dispersions can be considered as the basis for effective natural antimicrobial drugs with inducing activity.
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Popova et al. (2026) studied this question.
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