Diaporthe속은 전세계적으로 중요한 곰팡이 병원균 중 하나이다. 블루베리에 발생하는 병에 관한연구 결과 강원도 춘천시와 고성시의 블루베리 농가에서 5균주의 Diaporthe속을 분리하였다. 이들의 형태적 특징과 분자생물학적 특징을 조사한결과 Diaporthe amygdali, D. eres, D. nobilis, D. phaseolorum, Diaporthe sp.로 동정되었다. 병원성 검정결과 Diaporthe amygdali, D. nobilis, D. phaseolorum 은 상처를 낸 잎에서 5~10mm의 병반을 형성하였다. Diaporthe eres는 상처낸 잎에서 10mm 이상의 병반을 형성하였고 Diaporthe sp.는 상처를 낸 잎에서 5mm 이하의 병반을 형성하였다. 하지만 상처를 내지 않은 잎과 과실에서는 병반을 확인할 수 없었다. 온도 생장특성은 D. eres, D. nobilis, D. phaseolorum, Diaporthe sp.는 25℃에서 D. amygdali는 30℃에서 가장 높은 생장을 보였다. 모든 분리균들은 oxine-copper, benomyl, fluzinam, prochloraz manganese complex에서 80%이상 의 생장저해율을 보였고 captan과 mancozeb는 250ppm, 500ppm에서 dithianon는 500ppm에서 80%이상의 생장저해율을 보였다.

In this study, we investigated the effects of the eco-friendly chemical bio-sulfur, on the citrus melanose-causing pathogen, Diaporthe citri, and on the pest, Panonychus citri. In an open field experiment with a plot-scale application of the chemicals: Mancozeb, lime sulfur, lime sulfur + machine oil, and bio-sulfur, the control group showed 70.6% disease severity compared with 10.3% for the Mancozeb-treated group. Among the eco-friendly treatments, disease severity was the lowest for the group treated with lime sulfur + machine oil (32.2%) and was 53.9%, 58.8%, and 58.1% following treatment with lime sulfur, and bio-sulfur diluted 500 and 1000 times, respectively. The proportion of diseased fruit showed similar results, suggesting that bio-sulfur is an effective alternative to lime sulfur. Three days after treatment acaricidal effects on P. citri showed a 197.6% control survival rate whereas the machine oil, and bio-sulfur diluted 500 and 1000 times treatments showed rates of 2.9%, 5.8%, and 9.0%, respectively. After three days, the control value for bio-sulfur diluted 1000 times was 73.2% compared with the values for the machine oil (96.4%) and bio-sulfur diluted 500 times (94.6%) treatments. Therefore, we suggest that additional research is needed on the combined application of bio-sulfur and oils to enhance the additive control effect on citrus melanose and Panonychus citri.