论文部分内容阅读
我区地处西北边陲,沙荒面积约占全区总面积的30%。沙生植物种类很多,常见大面积成林的有柠条、花棒、沙柳和黄柳等。沙生植物是我区固沙水土保持的宝贵财富,但近年来病虫害严重,影响了种子、苗木、穗条的产量、质量和林业生产的发展。从1963年以来,我曾对沙区沙生植物的病害做了一些调查研究,并对其中主要几种做了重点研究。柠条叶锈病(Uromyces sp.) 危害情况:此病遍布全沙区,主要危害柠条和花棒等幼苗和林木的叶子,尤以苗圃幼苗得病重,病叶提早脱落,幼苗得病严重时,会
My area is located in the northwestern border, sandy wasteland area accounts for about 30% of the total area. Many species of sandy plants, common large area of forest there Caragana, Hualian, Salix and yellow willow and so on. Sand plants are a valuable asset for soil and water conservation in our region. However, pests and diseases have been severely affected in recent years, affecting the yield, quality and development of forestry production of seeds, seedlings and spikes. Since 1963, I have done some research on the diseases of sandy plants in sandy areas, and have done some research on the major ones. Kakutei leaf rust (Uromyces sp.) Hazard: The disease all over the sand area, the main hazard to Caragana and Hibiscus and other seedlings and tree leaves, especially nursery seedlings get sick, diseased leaves fall off early, seedlings get sick when severe ,meeting