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花生线虫病,在我地区乐药河两岸,白沙河以南的砂性土和沙壤土地上普遍发生,一般减产百分之十至三十,重病地块,亩产荚果仅三十至四十五斤。花生线虫病的虫原从花生根部尖端侵入后,开始在主根和侧根的尖端形成不规则的虫瘿,随着病原的慢延,在虫瘿上长出很多小须根,在小须根上又长出次生的虫瘿,成为一个“乱发”状的须根团。虫瘿一般为小米粒大小,颜色与根色相似,受害重的病株,结果很少。在花生团棵期,地上病状表现最显著,病株萎缩不长,植株叶片自下而上逐渐变黄,如脱肥状。七、八月雨季来临以后、病株一般由黄转绿,矮缩,叶片窄小易与健株区别。
Peanut nematodes are common in sandy and sandy loam areas to the south of the Baisha River in both areas of the Leyao River in my area. Generally, 10-30 per cent of severely ill land plots yield only 30 to 45 per mu of pods jin. Peanut nematode wormhole from the root tip of peanut invaded, the beginning of the root and lateral root tip of the formation of irregular insects, with the slow pathogen, grow a lot of insects on a lot of small fibrous roots, the small fibrous roots and longer The second born worm, became a “messy” fibrous root group. Insects are generally millet grain size, color and root color similar to the victim of heavy diseased plants, the results rarely. During the peanut boll stage, the most obvious symptom on the ground, the diseased plants did not shrink for a long time, and the leaves of the plants turned yellow gradually from the bottom to the top, such as off-taking. July and August After the advent of the rainy season, the diseased plants generally turn from yellow to green, dwarfed, leaf narrow and easy to distinguish between different strains.