Effect of preharvest spraying Cryptococcus laurentii on postharvest decay and quality of strawberry |
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| Institution: | 1. Department of Entomology, 288 Farm Lane, Room 243, Michigan State University, East Lansing, MI 48824, USA;2. USDA-Agricultural Research Service, Biological Control of Insects Research Laboratory, 1503 South Providence Road, Research Park, Columbia, MO 65203, USA;3. Department of Horticulture, A288 Plant and Soil Science Bldg., Michigan State University, East Lansing, MI 48824, USA;1. College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, 730070, China;2. Department of Postharvest Science of Fresh Produce, Agricultural Research Organization, Rishon, LeZion, 7505101, Israel;1. Laboratory of Food Microbiology, Department of Nutrition, Center of Health Sciences, Federal University of Paraíba, João Pessoa, Brazil;2. Laboratory of Biochemistry of Foods, Center of Technology, Federal University of Paraíba, João Pessoa, Brazil;3. Nucleus of Research in Environmental Sciences, Catholic University of Pernambuco Recife, Brazil;4. Laboratoty of Microbiology, Department of Tropical Medicine, Federal University of Pernambuco, Recife, Brazil;1. College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, 730070, China;2. Department of Postharvest Science of Fresh Produce, Agricultural Research Organization, The Volcani Center, Bet Dagan, 50250, Israel;1. Crops Division, Ministry of Agriculture and Fisheries, Nu’u Research Centre, Nu’u, Samoa;2. 44 Gladstone Avenue, Northcote, Victoria 3070, Australia;3. Department of Entomology, University of California Riverside, CA 92521, USA;4. Department of Entomology, College of Natural Resources and Environment, South China Agricultural University, Wushan St., Tianhe District, Guangzhou 510642, China;5. School of Biological Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia |
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| Abstract: | Application of a suspension (log 8.0/ml) of Cryptococcus laurentii prior to harvest led to a reduction in Botrytis cinerea decay of strawberries stored at 4 or 20 °C, for 12 or 4 days, respectively. The frequency of spraying antagonist significantly influenced disease incidence in strawberry fruit. The best inhibition of disease was achieved when fruit sprayed C. laurentii with three applications that began 6 days prior to harvest, and the incidence of gray mold and natural decay treated with this method was 21% and 11%, compared with 88% and 62% in the control after storage at 20 °C for 4 days. A similar result occurred in the treated fruit after storage at 4 °C for 12 days. Dilation plate counts on Rose Bengal agar and scanning electron microscopy results showed that three applications with C. laurentii at 6, 3 and 0 days before harvest improved its ability to colonize the epidermis of strawberry fruit in the greenhouse and during storage compared to single application. In addition, antagonistic yeast spraying before harvest could reduce the weight loss, delay the decrease of the firmness and ascorbic acid, but had no significant effect on the contents of soluble solids, titratable acidity and fruit surface color. These results suggested that preharvest spraying with C. laurentii might be a promising alternative to fungicide application for decay control of strawberry. |
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| Keywords: | Strawberry Preharvest spraying Postharvest diseases Quality |
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