Inhibition of Acid Calcium Sulfate on Postharvest Red Globe Grapes of Botryis cinerea
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Abstract:
Botrytis cinerea is one of the main diseases that cause postharvest storage and transportation of grapes. In order to investigate the effects of acid calcium sulfate (ACS) on the suppression and quality of fresh grapes after harvest, Red Globe grape was used as the test material, sprayed with ACS (pH=5.45) for 20 s, and stored at (8±2) ℃. The ACS treatment was used to analyze the diseased area and incidence of Botrytis cinerea (B. cinerea). The inhibition rate, colony diameter, the changes of fruit hardness, weight loss rate, soluble solids, titratable acid, and electrical conductivity were measured, and the effect of ACS treatment on the inhibition of botrytis cinerea and quality parameters was studied. The results showed that ACS treatment could significantly inhibit the growth of B. cinerea. At 15 days during the storage, the lesion area, morbidity and colony diameter were significantly lower than those of the control treatment (p<0.05), which were decreased by 67.02%, 56.55% and 98.16%,respectively, and the bacteriostatic rate reached 96.06%. ACS treatment can significantly reduce the lesion area and morbidity of botrytis cinerea, and also has a significant inhibitory effect on the occurrence of B. cinerea when cultured in vitro. ACS treatment can reduce the weight loss rate of grape fruits, maintain the fruit hardness, inhibit the decrease of soluble solids content, and maintain the quality of grapes after harvest. ACS, as a new type of high-efficiency bactericidal preservative approved by FDA and USDA, provides a new method for the research of table grape technology.
