植物寄生线虫一生大部分时间生活在土壤中,在植物上取食的时间很短,即使是固定寄生在植物体内的线虫,它们的卵或侵入寄主前的幼虫和雄虫也有一段时间生活于土壤中。因此,植物寄生线虫的主要生态环境是土壤。植物寄生线虫都是专性寄生物,只能在活的植物上取食和繁殖,在植物体外则依靠自己体内贮存的养分生活。秋季土温逐渐下降,线虫就以卵、卵囊和胞囊等在土壤中越冬。土壤低温干燥,线虫体内营养消耗慢,存活时间长;土壤温度高湿度大,线虫活动性强,体内养分消耗快,存活时 Parasitic nematodes live most of their life in the soil, taking very short periods of time on plants, even for nematodes that are parasitic in plants, their eggs, or larvae and males that invaded the host life for some time . Therefore, the main ecological environment of plant parasitic nematodes is soil. Plant parasitic nematodes are obligate parasites, which can only be fed and multiplied on living plants, and depend on the nutrients stored in the body outside their plants in vitro. Soil temperature gradually decreased in autumn, nematodes on eggs, oocysts and cysts in the soil overwintering. Soil dry at low temperature, nematode nutrition consumption slow, long survival time; soil temperature and humidity, nematode activity, rapid consumption of nutrients in the body, when alive