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稻根线虫(Hirschemanniella SPP)是一种体内寄生性线虫,它寄生于幼根里,吮吸汁液并在其中繁殖。当作物收获后,线虫残存于土壤中的稻根部,然后进入到土壤中,它们能在没有寄主的土壤中继续生存约8个月。在播种和移栽的时候,土壤中的线虫数量通常不是很多的,每100克土壤中大约有10～80条。在有寄主存在的条件下或者在寄主分蘖时,它们繁殖得相当快,一株上可聚有1万条。稻根被侵染后,初期表现浅褐色。这时即使土壤中没有线虫存在,稻根也会随即变成黑褐色,若土壤中还有线虫存在,变色过程将会加速。最终使稻根呈暗黑色。线虫侵入早期,侵入口会形成坏死斑。在根
Hirschemanniella SPP is an in vivo parasitic nematode that parasitizes in the root, sucks juice and multiplies in it. When the crop is harvested, the nematodes remain in the root of rice in the soil and then enter the soil, where they can survive for about 8 months in the hostless soil. When sowing and transplanting, soil usually contains very few nematodes, with about 10-80 per 100 grams of soil. They flourish fairly quickly in the presence of hosts or at the host tillers, with 10,000 aggregates per plant. Infected rice roots, the initial performance of light brown. At this time, even if no nematodes exist in the soil, the rice roots will turn dark brown. If there are nematodes in the soil, the discoloration will be accelerated. Eventually dark rice roots. Nematodes invade early, invading the mouth will form necrotic spots. At the root