For many years, many insecticides, miticides, nematicides or soil pesticides have been used, but many of them have various problems such that the effects are inadequate, their use is restricted as insects, etc. have acquired resistance, etc. Accordingly, it is desired to develop a novel insecticide, miticide, nematicide or soil pesticide substantially free from such problems. Therefore, the present invention is to provide a novel insecticide, miticide, nematicide or soil pesticide having a very high controlling effect against insects, mites, nematodes or soil pests at a low dose.The present invention provides an insecticide, miticide, nematicide or soil pesticide containing a benzamide derivative represented by the formula (I) or its salt, as an active ingredient:wherein R1 is a hydrogen atom or C1-3 alkyl, and R2 is C2-8 alkyl or C3-8 cycloalkyl.有多數的殺蟲劑、殺蟎劑、殺線蟲劑或殺土壤害蟲劑被長年使用,但是具有效力不充分、或害蟲等獲得抵抗性而造成使用限制等各種課題者並不在少數。因此,期望開發出所述缺點少的新穎的殺蟲劑、殺蟎劑、殺線蟲劑或殺土壤害蟲劑。在此,提供一種以低劑量對害蟲、蟎、線蟲或土壤害蟲有極高的防治效果的新穎的殺蟲劑、殺蟎劑、殺線蟲劑或殺土壤害蟲劑。本發明提供一種含有以式(I)表示之苯甲醯胺衍生物或其鹽類作為有效成分之殺蟲、殺蟎、殺線蟲或殺土壤害蟲劑:[式中,R1係氫原子或C1-C3烷基;R2係C2-C8烷基或C3-C8環烷基]。
