Overwinter and Survival of Colletotrichum gloeosporioides and Glomerella cingulata in Soil and Plant Debris of Strawberry

Nam, Myeong Hyeon; Song, Jung Young; Kim, Hong Gi

Research in Plant Disease 2004;10(3):198-202.
Published online September 30, 2004.

딸기 병걸린 식물잔재물과 토양에서 탄저병균 Colletotrichum gloeosporioides와 Glomerella cingulata의 월동과 생존

남명현, 송정영, 김홍기

Overwinter and Survival of Colletotrichum gloeosporioides and Glomerella cingulata in Soil and Plant Debris of Strawberry

Myeong Hyeon Nam, Jung Young Song, Hong Gi Kim

Abstract

The overwinter and survival of Colletotrichum gloeosporioides and Glomerella cingulata in strawberry tissues under field conditions was investigated in 2001 and 2002. The rates of overwinter survival in plant petiole, runner and crown were 68.7, 14.3, and 26.7%, respectively. But, under field condition, viable conidia of overwinter were not detected at the surface, 3, 5, and 10 cm depths of soil. To investigate the survival ability in soil and plant debris, C. gloeosporioides and G. cingulata isolates from strawberry were examined in laboratory and field. The viability of conidia was rapidly declined in all the treatments, with a 40% reduction in population within 10 days. In soil, the survival ability of G. cingulata conidia was similiar to that of C. gloeosporioides. The survival rate of conidia was highest under cool and dry soil conditions, and was decreased by increasing both soil temperature and moisture content. Similar results were also obtained under the condition that infected petioles were buried in soil. Results suggested that conidia as well as plant debris might be a main primary inoculum source of strawberry anthracnose.

Key Words: Colletotrichum gloeosporioides, Glomerela cingulata, overwinter, strawberry, survival ability