沤肥浸渍液对小麦白粉病作用效果初步研究

Effects of Compost Extracts on Wheat Powdery Mildew

将新鲜牛粪、猪粪、马粪、羊粪分别和土、自来水按１：１：３的比例混合，在温室条件下沤制半年后，加水取其浸渍液，并将浸渍液喷洒于小麦叶片上，两天后用自然发病产生的白粉菌接种。２周后记载每叶病斑数进行评估。和用清水处理的对照相比，各沤肥浸渍液对小麦白粉病的抑制作用在０．０１水平上均达显著。利用细菌过滤器处理过的各沤肥浸渍液也具有基本相似的作用效果，作用机理正在进一步研究之中。

Mixtures of fresh cow dung, fresh pig dung, fresh sheep dung, fresh horse dung separately with soil and tap water at ratio 1: 1: 3 were incubated for 6 months under greenhouse conditions. After having been poured into water for a week, the compost extracts were taken out and sprayed on the 3 days old wheat leaves. The leaves were inoculated with conidia of Erysiphe graminis after two days, that was collected from the infected wheat plant in greenhouse. After two weeks of inoculation, the number of lesions on wheat leaf were counted to assess the efficiency of compost extracts. As compared to the control treated with water, all the compost extracts could effectively inhibite the development of Wheat powdery mildew. All through filtration degerminated compost extracts hate shown similary effects also. Study on the action mechanism was in progress.