Journal
POSTHARVEST BIOLOGY AND TECHNOLOGY
Volume 56, Issue 1, Pages 39-43Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.postharvbio.2009.10.003
Keywords
Tea saponin; Citrus postharvest diseases; Synergistic effect; Geotrichum candidum
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Funding
- Scientific Technological Planning of Guangdong Province [200813050100045]
- National Natural Science Foundation of China [30871660]
- Foundation for the Author of National Excellent Doctoral Dissertation of P R China [200461]
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Tea saponin (TS), generally regarded as a safe compound, was evaluated to control postharvest decay of citrus fruit. TS inhibited mycelial growth and spore germination of Penicillium italicum, P. digitatum and Geotrichum candidum. The influence of TS on the growth of hyphae and germination of spores of P. italicum, P. digitatum and G. candidum was determined individually and in combination with imazalil and prochloraz. The results indicated the best ratio of TS (8:2) with a low rate of prochloraz or imazalil to control P. italicum, P. digitatum and G. candidum. TS was compatible with these fungicides at this ratio and consistently improved their performance to control blue mold, green mold or sour rot on inoculated 'Shatang' mandarin fruit and the combination also could prolong the persistence of TS residues in the fruit. The level of disease control provided by the synergistic combinations tested was higher than that of the individual treatments of these fungicides. TS alone or in combination with a low rate of prochloraz or imazalil significantly reduced postharvest decay in 'Shatang' mandarin fruit without impairing any of the other fruit quality parameters. (C) 2009 Elsevier B.V. All rights reserved.
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