【摘要】 从苍术黑斑病叶片上分离得到黑斑病病原菌[Alternaria tenuissima (Kunze) Wiltshire],对其生物学特性进行了研究。研究结果表明,病菌菌丝在15~35℃都能生长,最适温度为25℃;pH在4~11都能生长,最适pH为6.0~7.0。在Czapek培养基上,病原菌以葡萄糖和甘露醇为碳源生长最好,以硝酸钾为氮源生长最佳。30%苯醚甲.丙环乳油和10%苯醚甲环唑水分散粒剂对菌丝生长有很好的抑制效果,而75%代森锰锌可湿性粉剂和75%百菌清可湿性粉剂对菌丝生长的抑制效果较差。更多还原

【Abstract】 The pathogen causing dark leaf spot on Atractylodes lancea was isolated from the diseased leaves.The temperature for mycelial growth of A.tenuissima ranged from 15 to 35 ℃,with the optimum temperature at 25 ℃.The pH value ranged from 4.0 to 11.0,with the optimum pH from 6.0 to 7.0.On defined Czapek media,glucose and mannitol were the optimum carbon sources,while KNO3 was the optimum nitrogen source.30% Propiconazole and difenoconazole EC,and 10% difenoconazole WG showed a strong inhibition effect on mycelial growth,while 75% mancozeb sulfur WP and 75% chorothalonil WP showed weak inhibition.更多还原