【摘要】 对我国高粱上发生的一种新病害──高粱靶斑病进行了初步的研究。结果表明：（１）引起靶斑病的病原菌为蜀黍生离蠕孢菌 [Bipolaris sorghicoa (Lefebvre & Shetwin) Shoem];(2)病菌菌丝生长的适宜温度为２５～３０℃，分生孢子萌发的适宜温度为２０～３０℃；分生孢子萌发的适宜ｐＨ为３～６；（３）该菌能利用多种碳源作为营养，以木糖、半乳糖、菊糖为佳，其次为蔗糖、麦芽糖等；利于病菌生长的培养基为玉米粉、燕麦片和白高粱煎汁培养基；（４）田间土壤表面残落的和堆积在村屯附近的高粱秸垛表面的病残叶上的病菌，是翌年田间病害发生的主要初侵染来源；（５）所鉴定的 ６２０份高粱不同品种资源中，对靶斑病的感病性存在明显差异，其中２６份为免疫和高抗资源。更多还原

【Abstract】 A newly occurred sorghum Target leaf spot caused by Bipolaris sorghicola (Lefebvre & Shetwin) Shoem was studied in this paper. (1) The optimum temperature for pathogen mycelia growth was 25-30℃ and that for conidia germination was pH3-6; (2) The pathogen could use many kind of sugar as a carbon nutrient, the favorite sugar were xylose, galactose, inulin and lactose, dextrose and maltose took second place. The fungus grew well on corn meal agar. (3) The residue or diseased plant on soil surface of in field and a stack of sorghum stalks near. the village were proved to be a major initial effective source of next year. (4) Identification of 620 sorghum accessions for disease resistance showed that there was significantly different resistance to B. sorghicola between sorghum varieties, 26 of them were resistant resources.更多还原