Repellence of plant essential oils to Dermanyssus gallinae and toxicity to the non-target invertebrate Tenebrio molitor.

摘要: With changes in legislation and consumer demand, alternatives to synthetic acaricides manage the poultry red mite Dermanyssus gallinae (De Geer) laying hen flocks are increasingly needed. These mites may cause losses egg production, anaemia even death of hens. It be possible use plant-derived products as D. repellents, especially if such have a minimal impact on non-target organisms. An experiment was conducted with assess repellence range plant essential oils, previously found varying toxicity (relatively highly toxic non-toxic) this pest. Experiments were also undertaken these mealworm beetles (Tenebrio molitor L.), invertebrate typical production systems. Results showed that all seven oils tested (manuka, thyme, palmarosa, caraway, spearmint, black pepper juniper leaf) repellent at 0.14 mg oil/cm3 (initial concentration) during first 2 days study. Thyme oil appeared most effective, where lasted until end study period (13 days). At same concentration T. differed, palmarosa manuka being no more adult than control. There neither significant association between rank gallinae, nor (as determined) molitor.