自1974年起,甜菜白粉病成为严重病害。虽然用可湿性硫黄粉喷用可以防治该病,但育出抗病品种从对环境上和经济上更为合算。病理学家Mumford D.L.和植物遗传学家Theurer J.C.提出精确、快速的温室筛选法。具体做法是将甜菜种于温室中,5周后用感白粉病的甜菜放在无病甜菜上方2—3英尺摇动2—3次,使白粉病孢子落到无病株上,观察7—8天,看无病株是否出现病症。幼苗筛选只需6周,在温室这种方法可整年进行,结合筛 Since beet powdery mildew has become a serious disease since 1974. Although the use of wet sulfur powder spray can control the disease, but bred resistant varieties from the more environmentally and economically more cost-effective. Pathologist Mumford D.L. and plant geneticist Theurer J.C. propose an accurate and rapid greenhouse screening method. The specific practice is to plant the sugar beet in the greenhouse, after 5 weeks with powdery beet on the disease-free beets 2-3 feet 2-3 times shaking, powdery mildew spores fell on diseased plants observed 7-8 Days, see whether the disease-free strains appear. Seedlings are screened in just 6 weeks and in the greenhouse this method can be done year-round with a combination of sieves