Control efficacy against citrus green and blue mold and effects on postharvest storage quality of Shatang mandarin fruit by tea saponin combined with triabendazole
In order to evaluate the efficacy of tea saponin and triabendazole against postharvest citrus green and blue mold, the co-toxicity of tea saponin and triabendazole to citrus green and blue mold was determined by the use of mycelium growth rate method and co-toxicity coefficient method. Control efficacy and effects on postharvest storage quality of the synergistic combinations against postharvest disease caused by Penicillium italicum and P. digitatum in Shatang mandarin fruit were also investigated. The results showed that the best mixed ratio of tea saponin and triabendazole to inhibit mycelium growth of P. italicum and P.digitatum was 8:2,and their synergistic ratios (SR)were 2.77 and 1.60,respectively. The mixture at 400 mg· L-1 significantly reduced postharvest decay in Shatang mandarin fruit, the incidence of green and blue mold was only 1.53％ ,while control fruit had 86.59％ decay. Meanwhile, the treatment by tea saponin combined with triabendazole did not impair any of the fruit quality parameters such as total soluble solids (TSS), titratable acidity (TA) and ascorbic acid.
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