在张北县七区馒头营村第一社社长于登奎的地里,把0.5%的六六六粉用细土掺和成4倍的毒土(即1斤药3斤细土),拌在切好的种薯块上防治金针虫和蛴螬两种地下害虫,效果很好。据观察幼苗拌过种的比不拌种的生和粗壮,拌的直径为十分之七厘 In Zhangbei County seven districts steamed bread village first agency Yu Dengkui’s land, the 0.5% of six six six powder with fine soil into 4 times the poison soil (ie 1 kg of medicine 3 pounds fine soil) Mixed in the cut seed tubers on the prevention and control of pinworm insects and two underground pests, the effect is very good. It is observed that the seedlings were mixed than the seed dressing and sturdy, mixed with a diameter of seven tenths of a tenth