Abstract
Considering the huge economic loss caused by postharvest diseases, the identification and prevention of citrus postharvest diseases is vital to the citrus industry. In 2018, 16 decayed citrus fruit from four citrus varieties—Satsuma mandarin (Citrus unshiu), Ponkan (Citrus reticulata Blanco cv. Ponkan), Nanfeng mandarin (Citrus reticulata cv. nanfengmiju), and Sugar orange (Citrus reticulata Blanco)—showing soft rot and sogginess on their surfaces and covered with white mycelia were collected from storage rooms in seven provinces. The pathogens were isolated and the pathogenicity of the isolates was tested. The fungal strains were identified as Lasiodiplodia pseudotheobromae based on their morphological characteristics and phylogenetic analyses using the internal transcribed spacer regions (ITS), translation elongation factor 1-α gene (TEF), and beta-tubulin (TUB) gene sequences. The strains could infect wounded citrus fruit and cause decay within two days post inoculation, but could not infect unwounded fruit. To our knowledge, this is the first report of citrus fruit decay caused by L. pseudotheobromae in China.
Highlights
Plants 2021, 10, 202. https://doi.org/Citrus is the second-largest fruit crop in China
16 L.collected pseudotheobromae strains isolated fromof rotten citrus fruitstudy, which were from storage roomswere in seven provinces
L. pseudotheobromae fruit rot onincitrus in provinces citrus fruitreport which were collected from causes storage rooms seven of China
Summary
Plants 2021, 10, 202. https://doi.org/Citrus is the second-largest fruit crop in China. Citrus is the second-largest fruit crop in China. It is cultivated in over 20 provinces, with an area of approximately 2.5 million ha [1,2]. China has an over 4000-year history of citrus cultivation. There are an abundant and excellent variety of resources in China. Fruit decay is a common disease during postharvest transportation and storage. The decay rate is 20% to 30%, and sometimes it can reach up to 50%, which causes serious postharvest economic losses [3]. Disease control is vital for the postharvest period of citrus fruit
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