Impact of chitosan-potassium iodate nanocomposite on the growth of zucchini seedlings and fungistatic effect on Podosphaera xanthii

Nazario Francisco-Francisco, Jorge Francisco León De la Rocha, Hortensia Ortega ORtiz

Abstract


Background: Chitosan nanoparticles (NPsCS) and potassium iodate (KIO3) currently show biostimulation and bioprotection benefits in agricultural crops; however, there are few plant species and pathogens in which chitosan-iodate nanocomposite (NPsCS-KIO3) have been evaluated. Objective: To evaluate low concentrations of NPsCS-KIO3 dispersions in the growth of zucchini (Cucurbita pepo L.) seedlings and the control of powdery mildew (Podosphaera xanthii). Methodology: Applications of serial dilutions of 10-1, 10-2, and 10-3 of the NPs-KIO3, NPsCS, and KIO3 treatments were carried out on the cotyledons of the seedlings under a completely randomized design. The results were processed with ANOVA and means tests were performed (Tukey, p = 0.05). Results: It was found that treatment with NPsCS-KIO3 at 10-1 (2.5 mg L-1) was the most effective in reducing the area under the disease progress curve (AUDPC) and stimulated the formation of leaves with a statistical difference from day 34 after its application. Implications: The results of this work contribute to the evidence of the biostimulant effect of NPsCS-KIO3 in the foliar development of zucchini plants and in vivo fungistatic effect at low concentrations.  Conclusion: The application of nanocomposite NPsCS-KIO3 at a concentration of 2.5 mg L-1 stimulates zucchini plant growth and promotes a fungistatic in vivo effect on P. xanthii compared to individual applications of NPsCS and KIO3.

Keywords


Disease severity; conidial germination; root weight.

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References


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URN: http://www.revista.ccba.uady.mx/urn:ISSN:1870-0462-tsaes.v28i3.62852

DOI: http://dx.doi.org/10.56369/tsaes.6285

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