Pheromone monitoring of click beetles as a basis of elaters harmfulness forecast and sustainable insecticide applicationMonitoring feromonowy sprężykowatych jako podstawa do prognozowania szkód i celowości zabiegów chemicznych

Abstract

Summary Soil excavation results determined the structure of elater dominance in grain crops and corn in Belarus. Three click beetle species were dominant: Agriotes sputator L., A. lineatus L., and A. obscurus L. A high efficiency of click beetle sexual pheromone was obtained. The pheromone was synthesised at the Organic Chemistry Department of the Belarussian State University. Click beetle monitoring with the help of pheromone traps, and a technique for defining wireworm population density, and their harmfulness forecast on the caught beetles is developed. The economic thresholds of wireworm harmfulness in agriculture were calculated. Beetle numbers were defined according to those caught in pheromone traps and the beetle numbers corresponded to larvae threshold indicators. An assortment of effective insecticidal seed dressers against the given pests was formed.