Control of anthracnose tear stain on the fruits of the citrus cultivar 'Natsumi'
2016
Muramoto, K. | Kanetsune, Y. | Munesue, S.
The occurrence of rusty, brown stains on the fruits of the citrus cultivar 'Natsumi' before harvest causes financial loss to growers because of lower returns due to their unattractive appearance. During the course of this study, Colletotrichum gloeosporioides was isolated from the rusty, brown area and was identified as the agent responsible for this symptom by inoculating the fungus with the 'Natsumi' fruits. The results revealed that the symptom results from the disease 'anthracnose tear stain.' After field experiments, the results revealed that the number of tear-stained fruits decreased when dead branches and fruits in the outer periphery of the trees were removed. In addition, pyraclostrobin-boscalid and kresoxim-methyl are effective fungicides in controlling this disease.
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