Abstract
Pink rot of Palm was occurred at Yeuju area in 2001 and 2003. Infected plants showed rotting at the leaf-stock bases and killing of the terminal bud. The first symptoms are dark brown necrotic areas on the stem. Bases of infected frond may be covered with pink spores and the spots produced oozing gum pockets. Oozing lesions occur on the stems, and leaves turn brown and droop. The causal agent were isolated from salmon-pink spores sporulating on the leaf sheaths and necrotic stem tissues. Pathogen were isolated from freshly infected tissues were identified as Gliocladium vermoseni based on mycological characteristics. Fungus were grown plenty on PDA culture. Temperature for mycelial grown was tested at 5 to $40^{\circ}C$ and optimal temperature was $25^{\circ}C$ and was not nearly grew at temperature above $35^{\circ}C$. Artificial pathogenicity were tested on 9 species of Palm family in the wound inoculation and symptoms showed similar to those observed in the field. This is the first report on pink rot of palm in Korea.
2001년과 2003년 경기도 여주시 관엽재배 농가에서 세이브리찌야자의 줄기에 암갈색의 불규칙한 모양을 가진 병반이 형성되며 병든 줄기를 타고 끈적끈적한 연갈색 내지 암갈색의 고무액이 흐르는 증상이 발생하였다. 심하게 괴사된 줄기의 조직 속에는 분홍색 내지 오렌지색의 분생포자퇴가 다량 형성되어 있었다. 병든 식물의 병반으로부터 병원균을 분리하여 균학적 특징과 병원성을 검정한 결과 Gliocladium vermoseni으로 동정되었다. 분생포자의 모양은 타원형이며 무색으로 크기가 3.2${\sim}$4.0${\times}$4.8${\sim}$6.0 ${\mu}m$이었고 균사생장은 $25^{\circ}C$와 $30^{\circ}C$에서 가장 좋았고 $35^{\circ}C$이상 에서는 생장이 급격히 억제되었다. 본 연구에서는 야자에 발생하는 Gliocladium vermoseni에 의한 분홍썩음병(가칭)으로 명명하고자 제안한다.
