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Metalaxyl for Postharvest Control of Brown Rot of Citrus Fruit. Eliahou Cohen, Associate Principal Scientist, Division of Fruit and Vegetable Storage, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel. Plant Dis. 65:672-675. Accepted for publication 7 November 1980. Copyright 1981 American Phytopathological Society. DOI: 10.1094/PD-65-672.

Metalaxyl was effective in postharvest treatments of citrus fruit against Phytophthora citrophthora. It provided limited control of the fungus inside the infected peel and reduced fruit rot. When incorporated in the wax coating of the fruit, metalaxyl prevented the spread of Phytophthora mycelium to sound fruit and thereby eliminated contact infection, but it promoted development of Penicillium digitatum in infected fruits. A combination of metalaxyl and imazalil controlled both P. citrophthora and Penicillium digitatum.