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Aspect of Occurrence of Melanose (Diaporthe citri Wolf) on Yuzu Trees (Citrus junos Sieb) in Jeonnam Area, in Korea

전남지역 유과자원에서의 검은점무늬병 발생 양상

  • Hur, Kil-Hyun (Jeonnam Agricultural Research and Extension Services) ;
  • Park, Seur-Kee (Department of Applied Biology, Sunchon National University)
  • Published : 2005.06.01

Abstract

The occurrence of melanose was investigated on yuzu at Goheung and Boseong in Jeonnam province in 1997 and 1998 seasons. The disease occurrence on leaf was initiated from late May in 1997 and early May in 1998, severest in late of June on leaf, and in case of fruit, initiated from early July in 1997 and late June in 1998 with a peak in early August. The disease was occurred in twenty days more earlier in 1998 season than 1997 season. We think this was caused by temperatures during April and May. And it was supposed that the disease severity on the severest late of June was closely related to the rainfall and relative humidity during June. The disease severity was severer in old tree than the young.

전남 고흥과 보성지역 재배과원에서의 유자 검은점무늬병 발생 실태를 1997년과 198년에 조사하였다. 잎의 경의 1997년에는 5월 하순, 1998년에는 5월 상순부터 발생되기 시작하여 6월 하순에 가장 높은 발병도를 나타냈고, 과실의 경우 1997년에는 7월 상순, 1998년에는 6월 하순부터 발생되기 시작하여 8월 상순에 가장 높은 발병도를 나타냈다. 잎의 경우 1998년에 20여일 더 일찍 발생한 것은 4, 5월의 더 높은 평균 기온과 관련이 있었고, 6월 하순에 피해가 더 컸던 것은 6월의 강우량 및 상대습도와 밀접한 관련이 있었다. 이 병은 수령이 20년된 과원에서 가장 심하게 발생하였고, 수령이 낮은 과원일수록 적게 발생하였다.

Keywords

References

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