BAJ2740, a novel broad spectrum acaricide

摘要

BAJ2740 (proposed common name: spirodiclofen) is a novel acaricide from the new chemical class of tetronic acids. The compound provides excellent control of important mite pests such as Panonychus spp., Phyllocoptruta spp., Brevipalpus spp., and Aculus and Tetranychus species. Use rates range from 50 to 200g a.i./1000 litres. It shows no cross-resistance to currently available acaricides and although the mode of action is still under investigation, there is strong evidence that the compound interferes with the mite development. Therefore the onset of activity of BAJ2740 is somewhat slower compared to that of acutely acting acaricides but significantly faster than that of chitin synthesis inhibitors. The residual efficacy of BAJ2740 is outstanding. The compound has no impact on beneficial insects and is safe or only slightly harmful to beneficial mites depending on the use pattern. BAJ2740 is safe to users and consumers and has a favourable environmental profile. Its broad spectrum of activity, excellent long lasting efficacy, good plant compatibility in all relevant crops and lack of cross-resistance make BAJ2740 an excellent compound for the use in the most important markets for specific acaricides, e.g. citrus, pome fruits, stone fruits, grapes and nuts.