兰州地区草坪病害及防治

兰州地区草坪草发生的主要病害有立枯病、叶腐病、叶斑病、叶锈病和白粉病 .危害最大的系立枯病 ,该病在高温高湿和N肥偏多的情况下有蔓延趋势 .发病初期喷施甲基托布津、代森锰锌和百菌清可有效防治 .叶腐病由腐霉属真菌的菌丝体危害所致 ,主要损害多年生黑麦草的叶片 ,影响植株分蘖 ,造成草坪自然稀疏 .叶斑病的发病率很高 ,不同草种和品种都有感染 ,影响草坪草的长势 ,但不致植株死亡 .叶锈病只见于管理差的多年生黑麦草 ,常在气温开始下降的秋季发生 .白粉病只见于草坪型白三叶 .

Disease of turfgrass and controlling in Lanzhou region

Pythium blight(grease spot), leaf mould, common leafspot, rust and erysple are the main diseases of turfgrass in Lanzhou region, Gansu Province. Pythium blight did heavy harm to all turfgrass under high temperature and moisture as well as high concentration nitrogen of soil. It could be controlled by thiophanate methyl, mancozeb and ohlorothalonil when disease began to occur. Leaf mould was attacked by Fusarium nival, and had effect on perennial ryegrass's leaves and tillers, leading turf to become sparse. Common leafspot occurred in all species of turfgrass, but it only affected turfgrass growth, and did not lead to death. Rust was only detected in ryegrass during autumn beginning after air temperature decline. Erysple occurred in white clover from September to October.