| 전남지역 유자과원의 검은점무늬병균 포자 형성과 비산 |
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허길현, 박서기 |
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| Sporulation and Dissemination of Pycnidiospores of Diaporthe citri in Yuzu Tree (Citrus junos Sieb) in Jeonnam Area |
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Kil Hyun Hur, Seur Kee Park |
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| Abstract |
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Several time-course experiments were carried out to understand seasonal development of melanose on yuzu trees at koehung area, Jeonnam province, during May to October. The occurrence of dead twigs, known as a source of infection, was much more in older trees, and from June to August, mostly in July. In the experiment of pycnidia development on dead twigs seasonally collected, the number of developed pycnidia was highest on July-collected dead twigs especially with the diameter of 1.1~1.5 cm. In the collection survey of disseminated pycnidiospores, although the collected number of pycnidiospores was affected with amount of precipitation, the number of observed pycnidiospores in rainwater was relatively high from June to August, with highest in early August in 1997 and late July in 1998. In the inoculation tests on 3-year-old trees and fruits in natural condition, disease occurrences were mostly affected on twigs by inocula treatment in June, and on fruits by inocula treatment in July, respectively. |
| Key Words:
Diaporthe citri, Melanose, Pycnidia, Pycnidiospore, Yuzu |
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