Seasonal Occurrence and Infection Site of Strawberry Anthracnose

Kim, Seung Han; Choi, Sung Yong; Lim, Yang Sook; Yoon, Jae Tak; Choi, Boo Sull

Research in Plant Disease 2002;8(1):45-49.
Published online March 30, 2002.

딸기탄저병의 시기별 발생과 감염경로

김승한, 최성용, 임양숙, 윤재탁, 최부술

Seasonal Occurrence and Infection Site of Strawberry Anthracnose

Seung Han Kim, Sung Yong Choi, Yang Sook Lim, Jae Tak Yoon, Boo Sull Choi

Abstract

Seasonal occurrence of strawberry anthracnose in greenhouses caused by Colletotrichum sp. was examined from 1997 through 1999 at three locations, Kyeongju, Goryeong, and Cheongdo in Kyungbuk province, Korea. Also some factors related to the anthracnose infection such as initial infection sites, inoculation methods, and soil nature were studied through in vitro and field experiments. The anthracnose disease begun to occur from 15 days after transplanting in early October, and continued but gradually decreased thereafter for 2 months until December. After transplanting, initial infection mainly occurred through the runner of which the tissue was more susceptible to the anthracnose than those of the leaf and petiole when the fungal mycelial disk was inoculated. Postplanting inoculation by irrigation with spore suspension was much more effective in inducing the anthracnose disease than preplanting soil mix. However, without inoculation, no or little anthracnose occurred regardless of commercial, non-cultivated or diseased field soils when healthy seedlings were planted. This suggests that occurrence of strawberry anthracnose in fields may be related to contamination of plant propagules with the anthracnose pathogen.

Key Words: anthracnose, penetration