Insecticide susceptibility of a generalist predator Labidura riparia (Dermaptera: Labiduridae)

Abstract

Using a direct spraying test in the laboratory, nine Bt insecticides, a Beauveria bassiana insecticide, two IGRs (methoxyfenozide and chromafenozide), and a synthetic insecticide (pyridalyl) were determined to be harmless and a synthetic insecticide (dinotefuran) was determined to be slightly harmful to second instar Labidura riparia nymphs, which are regarded as an important natural mortality factor against insect pests in various crop fields. The use of these insecticides should be recommended in IPM programs to control cabbage insect pests, since they are regarded as being compatible with the conservation of L. riparia in the field.