The effect of preharvest 28.6% chitosan composite film sprays for controlling the soft rot on kiwifruit

Cheng Zhang, You-Hua Long, Qiu-Ping Wang, Jiao-Hong Li, Hua-Ming An, Xiao-Mao Wu and Ming Li
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Cheng Zhang: Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, P.R. China
You-Hua Long: Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, P.R. China
Qiu-Ping Wang: Guizhou Vocational College of Agriculture, Qingzhen, Guizhou, P.R. China
Jiao-Hong Li: Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, P.R. China
Hua-Ming An: Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, P.R. China
Xiao-Mao Wu: Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, P.R. China
Ming Li: Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang, Guizhou, P.R. China

Horticultural Science, 2019, vol. 46, issue 4, 180-194

Abstract: This study evaluated the effects of preharvest plant 28.6% chitosan composite film (CTS-Fh) sprays on the postharvest quality and diseases in kiwifruit (Actinidia deliciosa cv. 'Guichang'), it was screened and prepared by mixing chitosan, calcium, dextrin, ferulic acid and auxiliaries. 28.6% CTS-Fh solutions at different concentrations were sprayed three times during the fruit growing season. The obtained results show that 28.6% CTS-Fh sprays remarkably promoted the improvement of the yield and quality of the kiwifruit, significantly (P < 0.05) increased the Ca content and firmness, delayed the fruit ripening and softening, and enhanced the storability. Moreover, the kiwifruit soft rot was effectively controlled; the control efficiency was 61.68-88.79%. Additionally, the 28.6% CTS-Fh sprays significantly (P < 0.05) increased the content and activity of some defence-related secondary metabolites and enzymes, and could also increase the cell wall compactness in the kiwifruit. These results suggest that 28.6% CTS-Fh might trigger several defence responses in the kiwifruit against pathogenic infections. The doses of 28.6% CTS-Fh 200-400 dilution times were recommended for the practical application with regards to the production of kiwifruit.

Keywords: kiwifruit soft rot; chitosan film; preharvest spray; storage quality (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlhor:v:46:y:2019:i:4:id:84-2018-hortsci

DOI: 10.17221/84/2018-HORTSCI

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