近日有读者来电话咨询防治根结线虫用什么药比较好?现本刊约请了有关专家答复如下:在挖土剪除病根时覆土均匀混施药剂,或在树冠滴水线下挖深15厘米、宽30厘米的环形沟,灌水 Recently readers to call the root canal nematode prevention and treatment of what medicine is better? The magazine has invited experts to answer the following: remove the diseased roots in the excavation when the soil evenly mixed drug agents, or digging in the crown drip line 15 cm deep, wide 30 cm annular groove, irrigation