摘要
北京地区早熟禾叶斑（枯）病病原菌为早熟禾德斯霉，病原生物学研究表明：孢子萌芽的适宜温度为１６～３２℃，菌丝体生长的适宜温度是２４～３２℃。早熟禾榨出液对孢子萌芽有显著促进作用。２４℃下病菌产孢量显著高于其他温度；ＰＳ２Ａ培养基上产孢量最多。２０℃和２５℃下的病情指数显著高于其他温度。杀菌剂试验表明：７０％代森锰锌、８０％大生和５０％扑海因对该病有很好的预防保护作用。
Leaf spot (blight) of Kentucky bluegrass (Poa pratensis) in Beijing was caused by Drechslera poae (Baudys) Shoem. This study on the biological characteristics of the pathogen indicated: the optimum temperature for conidia germination was 16～32℃, for coenobium growth was 24～32℃;the extracted sap from bluegrass leaves had a significant stimulating effect on spore germination; at 24℃ conidia were produced more than at other temperatures, with the highest produce on PS 2A medium; at 20℃ and 25℃ the disease indices were the highest. It was also shown that fungicide mancozeb of 70% concentration, dithane M 45 of 80% and iprodione of 50% had very good preventive and protective effects against the disease.
出处
《草业学报》
CSCD
1998年第4期38-43,共6页
Acta Prataculturae Sinica
基金
北京市"八五"重点合同项目
关键词
草坪
早熟禾叶斑病
防治
早熟禾叶枯病
Turfgrass, kentucky bluegrass, leaf spot (blight), disease control
