仙客来叶斑病发病规律及药剂防治

Regular and Preventive Technology of Cyclamen Leaf Spot

通过对仙客来叶斑病病原菌的越冬、田间初侵染、种子带菌、室内抑菌、田间小区药效等进行试验。结果表明,仙客来叶斑病病原菌以菌丝或分生孢子的形式在病残体上越冬,成为该病的主要初侵染源,种子表面带菌是另一个传播途径;80%代森锰锌WP0.5g/kg、72%腐霉利WP0.8g/kg和50%多菌灵WP0.4g/kg化学药剂可有效防治仙客来叶斑病,并且经济安全、无副作用;此外,以0.1%高锰酸钾浸种30min或52℃温汤浸种10min进行种子处理,可以显著降低种子带菌量。

The foliar speckle pathogens of cyclamen was researched on their winter-living-through ability, field primary infection, seeds carries, indoor inhibition and field area germiciding effect and it was showed that, the pathogens mycelia and conidia can live though the winter on the infected plants and become the mainly primary infection sources, seeds carders is another infectors. Chemicals such as mancozeb 80% WP 0.5 g/kg, procymidone 72% WP 0.8 g/kg and carbendazim 50% WP 0.4 g/kg can efficiently prevent the foliar speckle disease with little side-effect. Immersion the seeds in 0.1% potassium permanganate 30 min or 52 ℃ mild blanching 10 min can also obviously reduce the amounts of pathogens.