Exploration on the Broad-Spectrum Disinfection Effect of Sodium Dichloroisocyanurate on Postharvest Pretreatment of Citrus

doi:10.16420/j.issn.0513-353x.2024-0854

Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (12): 3335-3345.doi: 10.16420/j.issn.0513-353x.2024-0854

• Cultivation·Physiology & Biochemistry • Previous Articles Next Articles

Exploration on the Broad-Spectrum Disinfection Effect of Sodium Dichloroisocyanurate on Postharvest Pretreatment of Citrus

CHEN Xingchen¹, ZOU Yunqian¹, JIANG Xiaoli¹, AI Zongkui², ZHANG Jiangwen², XU Rangwei¹, ZHU Feng¹, CHENG Yunjiang¹^,^**()

¹ National R & D Center for Citrus Preservation，Key Laboratory of Horticultural Crop Biology and Germplasm Genetic Improvement（Fruit Crops），National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops，Hubei Hongshan Laboratory，College of Horticulture and Forestry Science，Huazhong Agricultural University，Wuhan 430070，China
² Sichuan Guoguang Agrochemical Co.，Ltd.，Chengdu 610100，China

Received:2025-07-18 Revised:2025-09-28 Online:2025-12-25 Published:2025-12-20
Contact: CHENG Yunjiang

Abstract

Abstract:

‘Valencia’oranges，‘Newhall’navel oranges，and‘Ponkan’mandarins were used as experimental materials and treated with sodium hypochlorite and sodium dichloroisocyanurate（DCCNa）by immersion. The fruit decay rate，weight loss rate，soluble solids content，and titratable acid content were measured. Changes in microbial populations on the fruit surface were recorded，and inoculation experiments were conducted to evaluate the efficacy of different disinfectants against postharvest diseases. The results showed that DCCNa treatment significantly reduced the fruit decay rates by 8.70%，5.36%，and 7.67% in‘Valencia’oranges，‘Newhall’navel oranges，and‘Ponkan’mandarins，respectively，compared to the control. The microbial populations on the surface of‘Newhall’navel oranges and‘Ponkan’mandarins decreased by 68.09% and 52.49%，respectively. After inoculation，the lesion diameters of blue mold and sour rot were reduced by 17.47% and 11.36%，respectively. Treatments with different disinfectants had no significant effects on the soluble solids content or titratable acid content of the fruits. In summary，DCCNa can significantly reduce the postharvest decay rate of citrus fruits while maintaining their quality，inhibit the occurrence of postharvest diseases，demonstrating great potential as a broad-spectrum disinfectant for the postharvest pretreatment of citrus.

Key words: citrus, postharvest, pretreatment, broad-spectrum fungicide effect, sodium dichloroiso- cyanurate

CHEN Xingchen, ZOU Yunqian, JIANG Xiaoli, AI Zongkui, ZHANG Jiangwen, XU Rangwei, ZHU Feng, CHENG Yunjiang. Exploration on the Broad-Spectrum Disinfection Effect of Sodium Dichloroisocyanurate on Postharvest Pretreatment of Citrus[J]. Acta Horticulturae Sinica, 2025, 52(12): 3335-3345.

Figures/Tables 6

Fig. 1 Change of decay rate in Citrus treated with disinfectant t-test，“**”and“*”indicate significant differences at the same time point between the treatment group and the control group at the 0.01 and 0.05 levels，respectively，the same below

Fig. 2 Change of weight loss rate in citrus fruits treated with disinfectant

Fig. 3 Change of soluble solids content and TA in citrus fruits treated with disinfectant

Fig. 4 Changes of microorganisms on fruit surface of Newhall navel orange and Ponkan treated with disinfectant

Fig. 5 Pathogenic process of Newhall Navel Orange inoculated with pathogenic fungicide A：Penicillium italicum；B：Penicillium digitatum；C：Geotrichum citri-aurantii

Fig. 6 Observation on the growth of pathogenic fungicide in disinfectant environment A：Growth of pathogenic fungicide；B：Scanning electron microscope observation results

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Exploration on the Broad-Spectrum Disinfection Effect of Sodium Dichloroisocyanurate on Postharvest Pretreatment of Citrus

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