从小麦根际土中分离得到一种能取食B1和B2两种细菌的土壤食细菌线虫，并在马铃薯蔗糖培养基上富化培养成功。
A soil bacterivorous nematode feeding on bacteria B1 and B2 was isolated from rhizosphere soil of wheat and cultured on potato sucrose agar medium(PSA).
经初步识别，小麦茎基部的线虫中90%以上为腐生线虫，少数为植物寄生线虫和捕食线虫。
On the stem foots of wheat plant, more than 90% of the nematodes identified was saprophytic nematode, others were plant-parasitic nematode and predatory nematode.
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