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Postharvest chlorine treatments for the control of the persimmon black spot disease caused by Alternaria alternata

2001; Elsevier BV; Volume: 22; Issue: 3 Linguagem: Inglês

10.1016/s0925-5214(01)00084-9

1873-2356

Dov Prusky, Dani Eshel, Ilana Kobiler, Nir Yakoby, D. Beno-Moualem, Miriam Ackerman, Yohanan Zuthji, Ruth Ben Arie,

Plant Pathogens and Fungal Diseases

Black-spot symptoms, caused by Alternaria alternata, develop in 'Triumph' persimmon fruit during prolonged storage at −1oC. Preharvest dip treatment in the organic chlorine compound Troclosene sodium extended the storage life of the fruit by delaying development of black-spot disease (BSD). Troclosene sodium was more stable and efficient for the control of A. alternata than calcium hypochlorite. At 500 μg ml−1 Troclosene sodium significantly reduced the development of BSD in persimmon fruit sampled in 15 orchards in different growing regions of Israel. Following commercial dipping and storage at −1oC, the percentage of marketable fruit after 4 months of storage was 15–40% higher than in untreated fruit. Present results suggest that the BSD can be controlled by a simple dip treatment with chlorine disinfectant.