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我国农作物的根结线虫病,是在解放后才陆续发现的,目前已分布21个省(市),主要被害农作物计有35种。此外,尚有药用、观赏植物及热带林木43种,野生杂草25种。已经鉴定的病原线虫有九种。作物被害后根系侧面的分支细根或须根数量减少,产生畸形病变,形成很多形状、大小、数目不等的肿瘤状根结(见病症图),致使地上部分出现叶片发黄、变小、植株矮化、生长缓慢、发育不良、花少早衰,颇似缺水缺肥或感染毒病等症状。病根在后期
The root-knot nematode disease of crops in our country was discovered one after another after the liberation. At present, 21 provinces (cities) have been distributed and 35 crops have been harmed. In addition, there are medicinal, ornamental plants and tropical trees 43 species, 25 kinds of wild weeds. There are nine pathogenic nematodes that have been identified. After the crops were killed, the number of branches or fibrous roots on the side of the root decreased, resulting in deformity lesions. Many kinds of tumor-like root knots with different shapes, sizes and numbers (see disease map) were formed, causing yellowing and becoming smaller on the ground, Dwarfing, slow growth, poor growth, less premature infancy, like lack of water or lack of nutrition and other symptoms of poisoning. The root cause of the disease is later