Summary of findings:
- In the majority of countries surveyed, pyrethroid resistant populations of pollen beetle dominate (> 60% are resistant).
- From the countries surveyed, it is only in Switzerland that susceptible populations dominate but sample size was considered too small to be representative of the overall country situation.
- During 2014, only 11% of pollen beetle populations surveyed in Europe could be classified as pyrethroid susceptible.
- After an initial decline in the number of susceptible pollen beetle populations observed in Europe since the IRAC survey began in 2007, only small variations in the percentage of pyrethroid susceptible and resistant beetle populations have been observed since 2010.
- The majority of populations tested across Europe remained susceptible to neonicotinoid insecticides, however the percentage of populations with a lower sensitivity increased to 30% (21% in 2012 & 2013).
- There is currently no evidence to suggest that the lower sensitivity observed in the survey correlates with a reduced performance of neonicotinoid containing insecticide products which are used under field conditions, however resistance management practice should be implemented to avoid further susceptibility decline.
- There was no evidence of changes in organophosphate or indoxacarb susceptibility observed in the European countries surveyed.