Annual Report of The Kansai Plant Protection Society
Online ISSN : 1883-6291
Print ISSN : 0387-1002
ISSN-L : 0387-1002
Short Communications
Decreasing the frequency of conrol of citrus melanose by using the fungicides Dithianon for satsuma mandarin cultivation
Takashi Inuma
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2014 Volume 56 Pages 85-87

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Abstract

Citrus melanose caused by Diaporthe citri reduces the commercial value of mandarin fruit. It is time-consuming for growers to control this disease in Wakayama Prefecture because it is necessary to treat the trees with fungicides four or five times. In this study, Ditianon 42% wettable powder was sprayed twice by late-June and Mancozeb 80% wettable powder was sprayed in August. According to a meta-analysis of ratio of severely diseased fruits in five experiments, the risk of this system is somewhat lower than that of the conventional system (fungicide Mancozeb was sprayed four times). This result suggests that it is possible that the frequency of spraying to control melanose can be decreased to three or four times.

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© 2014 The Kansai Plant Protection Society
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