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蜜柚、柑桔线虫病是植物检疫对象,主要为害蜜柚、酸橙、甜橙、柑桔、柠檬、葡萄、柿、橄榄、香蕉等多种果树,常见的是根线生病和根结线虫病两种机。蜜柚、柑桔等果树受害后树势衰退,叶片枯黄,落叶,枯梢,严重时全株凋萎枯死。由于病原线虫寄生为害,使根组织过度生长,形成大小不等的根瘤,根毛稀少。新生根瘤后变为黄褐色至黑褐色,根瘤大多发生在细根上,受害的小根,产生根瘤突起,还会引起肿胀、扭曲、短缩等病变。侧根、主根受害时,产生瘤状突起物,最后老根根皮分离腐烂,病根坏死。受害严
Pomelo, citrus nematode disease is the object of plant quarantine, the main damage to pomelo, lime, orange, orange, lemon, grape, persimmon, olive and banana and other fruit trees, Disease two machines. Pomelo, citrus and other fruit trees after the decline of the tree, the leaves yellow, deciduous, dead shoots, severe wilting dead plant. Pathogenic nematodes parasitic damage, so that excessive growth of root tissue, the formation of nodules of varying sizes, root hair scarce. Nodules into a new brown to dark brown, nodules mostly occur in fine roots, the victim of small roots, nodules, but also cause swelling, twisting, shortening and other diseases. Lateral root, the main root damage, the tumor-like protrusions, the final root bark separation decay, root cause necrosis. Seriously affected