Abstract
In the previous report, it was reported that the controlled-release formulation of acetamiprid exhibited excellent efficacy in planting hole application and nursery box application against the diamondback moth on cabbage. For the purpose of finding out the more practical, effective usage in soil application for acetamiprid 2% granule, various treating methods were investigated. As a result of the trials, it was confirmed that the order of efficacy was as followed: planting hole application 1g/plant≈nursery box application 1g/plant>plant foot application 1g/plant, and planting hole application 1g/plant≈row application 6kg/10 a≈overall-ridge application 12kg/10a. In the planting hole application, there was no difference in the efficacy between the leaf stages of seedlings as far as the comparison between 2- and 4-leaf stage, and little difference in the efficacy of planting hole application between cell-raised seedlings and bare-root ones used.
