engleski

The efficacy of the new Agriotes sex pheromone traps in detecting wireworm population levels in different european countries

New Agriotes sex pheromone traps were tested in different European countries enabling the suitability of the traps in monitoring different populations and the relationship between pheromone trap catches and wireworm population levels to be studied under a range of climatic and agronomic conditions. Trials were done in the United Kingdom, Eastern Croatia, Central Croatia, central Romania, Central Eastern Romania, Germany, Bulgaria from 1999 to 2001. The areas of the regions where the experimentation was done have very variable climati and agronomic characteristics ( latitude ranged from 42* to 56*). All trials were done using a common protocol. In the first 2 years YALTOR and VARb traps were used while in 2001 a trap design suitable for both flying and crawling species (YALTORfunnel) was used. Individual traps were baited with the lures for one of the following species: A. lineatus L., A. oscurus, L., A. sputator, L., A.sordidus Illiger, A. rufipalpis, Brulle, A.brevis Candeze, A. litigiosus Rossi, A. ustulatus Schaller. Larval population was estimated by using bait traps and soil sampling. In all regions conducting studies the pheromone trap were confirmed to e a sensitive tool for detecting the key wireworm species present. Al all sites it was possible to detect the dominant species. Furthermore the traps appeard to be selective enough to distinguish A. sputator and A. brevis despite these two species being sistematically very close. Males of minor species (also not Agriotes) were found in some traps (for example Cyndopus pilosus Leske in Bulgaria). The response of the different species to the different monitoring tools was very variable. Generally sex pheromone traps proved to be much more sensitive tool than soil sampling and bait traps for larvae. For all species traps were able to detect wireworm populations below those that can be reliably detected using soil sampling and bait trapping. In addition pheromone traps proved to be effective in detecting the regional variations of swarming patterns of the same species.

Agriotes; wireworms; sex pheromone traps; Europe

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