Preservation Effect of Prochloraz-manganese Chloride Complex on‘Gonggan’(Citrus reticulata)Fruits

摘要

‘Gonggan’(Citrus reticulata)is a famous,high-quality and special citrus cultivar in the Xijiang River valley,Guangdong Province.However,it easily suffers from postharvest diseases,and thus is not tolerant to storage.Based on the preliminary test results,prochloraz-manganese chloride complex was selected as the disinfectant,and prepared into different concentrations for carrying out preservation test by dipping fruits.The fruit weight loss,soluble solids content and decay rate were analyzed,and the application security and sensory evaluation for fruit freshness and flavor were observed.The results showed that dipping fruits with prochloraz-manganese chloride complex solution had significant preservation effect on‘Gonggan’fruits in postharvest storage;the suitable concentration was 2.0-3.0 g/L,and the decay rates of fruits stored at room temperature for 30,60 and 90 d were below 5%,10%and 15%,respectively.Plate inoculation test further revealed that the pathogen of‘Gonggan’was sensitive to prochloraz-manganese chloride complex,and the concentration of 1.0 g/L was enough to produce significant antimicrobial effect.Other technical links related to postharvest preservation of‘Gonggan’with prochloraz-manganese chloride complex were discussed.