Survey of Overwintering Inoculum Potential of Anthracnose of Sweet persimmon Caused by Colletotrichum gloeosporioides

Kwon, Jin Hyeuk; Jeong, Seon Gi; Chung, Bu Keun

Research in Plant Disease 2007;13(3):204-206.
Published online December 30, 2007.

감나무 탄저병균(Colletotrichum gloeosporioides)의 월동 전염원 조사

권진혁, 정선기, 정부근

Survey of Overwintering Inoculum Potential of Anthracnose of Sweet persimmon Caused by Colletotrichum gloeosporioides

Jin Hyeuk Kwon, Seon Gi Jeong, Bu Keun Chung

Abstract

In 2006 to 2007, the potential inoculum source of the anthracnose of sweet persimmon caused by Colletotrichum gloeosporioides was surveyed. The infected twigs, buds, dead twigs, petiole, leaves, dropped fruits were collected and tested for their possibility as overwintering inoculum. The detection rates of the pathogen from various parts of sweet persimmon tree were varied. When the collected samples were examined in April. Over than 93.3% of infected twig samples were harbored mycelia of C. gloeosporioides, and 46.7% of infected buds, 36.7% of dead twigs, 23.3% of petioles, and 16.7% of leaves were beared pathogenic fungus. No pathogenic fungus were detecded from healthy twigs and buds. Infected twigs and bud was important overwintering sites and formed conidia actively in next spring. The infected twigs, leaves, petioles, and fruits in growing season produced great number of conidia and caused active dissemination of the anthracnose disease in sweet persimmon. In growing season, all of the infected parts, such as twigs, leaves, petioles, and fruits produced pathogenic fungus.

Key Words: Anthracnose, Colletotrichum gloeosporioides, Swet persimmon