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花生根瘿线虫为安全性的植物性寄生綫虫,是花生毁灭性的病害.前文曾对其寄主植物进行论述. 本文探討其生物学特性的另一方面。花生根瘿线虫的侵襲期幼虫在土壤中之垂直分布,多集中于耕作层中。以土麦至40厘米深处为最多,約占总幼虫数的80.9%,尤以20—30厘米的土层中,所包含的幼虫数,约占总幼虫敌的30.9%。深达80厘米,尚有其存在。侵襲期幼虫的水平移动能力不大,在文登现場观察結果,五、六月間,能达20厘米,不能达30百米。但能随水流傳播,所以流水带病,为花生根瘿线虫病的主要傳播因素之一.在轮作过程中,必需深切注意。花生根瘿线虫对于燥敏感易死,花生荚果上的虫瘿,或含有幼虫的土壤,若绝对含水量下降至2%,其中病原线虫皆已死亡。但在文登地区,立夏之前,及芒种以后,企图以翻土曝晒来消灭土壤中的病原线虫幼虫,由于毛细管的作用,没有得到显著的效果。
Peanut rootworm nematode as a safety of plant parasitic nematodes, peanut devastating disease.In the previous article, the host plant was discussed.In this paper, another aspect of its biological characteristics. In peanut rootworm nematode invasion of larvae in the vertical distribution of soil, and more concentrated in the tillage layer. Soil to 40 cm deep to the largest, accounting for about 80.9% of the total number of larvae, especially in the 20-30 cm soil layer, the number of larvae contained, accounting for about 30.9% of the total larvae. Deep 80 cm, there is still its existence. Invasive larvae horizontal movement capacity is small, Wendeng site observation results, in May and June, can reach 20 cm, can not reach 30 meters. But it can spread with the flow of water, so running water disease, peanut root nematode disease is one of the main transmission factors in the rotation process, the need for deep attention. Nematode peanut is sensitive to dryness, nematode on peanut pod, or soil containing larvae. If the absolute water content drops to 2%, all the pathogenic nematodes have died. However, in the Wendeng region, before the beginning of summer, and after the species were planted, attempts to destroy the pathogenic nematode larvae in the soil by tipping over the soil failed to achieve significant results due to capillary action.