Abstract
Occurrence and characteristics of infectious fungi and physiologically abnormal Paecilomyces tenuipes were examined. These unfavorable fungi are recently known to cause yield loss, decreased quality of products in artificial cultivation farms of P. tenuipes. Total 529 fungal isolates were collected from 22 farms of 7 provinces. These isolates were composed of physiologically abnormal P. tenuipes strains and other infectious fungal strains, which constituted 23.2% and 50.9%, respectively. Physiologically abnormal P. tenuipes strains showed irregular synemata, and absence of local color. They were divided into 4 types or C-l, C-2, C-3 and C-4. Other infectious fungal strains were identified to 5 species, Beauveria bassiana, Fusarium sp., P fumosoroseus, Tricothecium roseum, Aspergillus parasiticus, which were 22.1, 13.8, 7.6, 4.0 and 3.4%, respectively. All of them were hyphomycetous fungi, did not produce synemata, and revealed faster growth rate than that of P. tenuipes.
7개도 22개 재배농가로 부터 수집한 시료는 총 529점이었으며, 수집균은 두 가지 유형으로 구분되며 생육장애에 의한 기형균은 23.2%, 오염균은 50.9%였다. 생육장애는 C-1, C-2, C-3 및 C-4의 4가지 유형이 있으며 이들 분생자병속은 20∼70 개가 발생되는데 회색, 순백색 또는 등황색을 떤다. 분생자병속 말단은 분지하지 않고 솜털형태로 뭉치거나, 발생 도중 쉽게 시들어 버린다. 분리된 오염균은 5종으로 Beauveria bassiana, Fusarium sp., Pacilomyces fumosoroseuse, Tricothecium roseum, Aspergiilus parasiticus이며, 이들은 분생자병속을 형성하지 않고 기주 표피에 각각 고유색상을 띠며 PDA 배지상에서 균사생장량은 14일간 43∼75 m 범위로 눈꽃동충하초균보다 빠른 생장을 보인다.
