crops, an effective monitoring tool is required, both to determine the optimal timing for insecticide applications, and to understand the enigmatic population dynamics of this insect. Following the recent identification of the major sex pheromone component of the saddle gall midge, non-2-yl butanoate, a slow-release dispenser was developed using rubber septa. The release rates of 5 mg and 10 mg-loaded dispensers were initially measured under laboratory conditions, and their effectiveness in terms of pheromone loading and use duration was assessed in the field. The experiments showed that sticky traps baited with 5 mg loaded rubber dispensers, renewed every 6 weeks, are suitable for accurately monitoring male flights. H. marginata Keywords: baited lures; cereal pest; non2yl butanoate; rubber septa; semiochemicals; release dispenser. Highlights: A slow-release dispenser for trial rubber septa, was developed. H. marginata, Dispensers were with 5 mg or 10 mg of non-2-yl butanoate. Dispenser were initially measured under laboratory conditions. Pheromone loadings and use durations of the dispensers were assessed in the field. Specifically baited traps attracted large numbers of males in the field. H. marginata Introduction Between 2010 and 2012, outbreaks of saddle gall (von Roser, Haplodiplosis marginata 1840) (Diptera; Cecidomyiidae) occurred in Belgium and several other countries, including France, The Netherlands and the United Kingdom (Roberts et al., 2012; Censier et al., 2014a). The population dynamics of this European pest of cereals are rather enigmatic, with outbreak periods being interrupted by latency phases that can sometimes last up to several decades. In Belgium, for example, prior to 2010, damage by had not been reported since the H. marginata 1970s (De Clercq and D’Herde, 1972; Latteur, 1972; Skuhravý et al., 1983). As this insect is
crops, an effective monitoring tool is required, both to determine the optimal timing for insecticide applications, and to understand the enigmatic population dynamics of this insect. Following the recent identification of the major sex pheromone component of the saddle gall midge, non-2-yl butanoate, a slow-release dispenser was developed using rubber septa. The release rates of 5 mg and 10 mg-loaded dispensers were initially measured under laboratory conditions, and their effectiveness in terms of pheromone loading and use duration was assessed in the field. The experiments showed that sticky traps baited with 5 mg rubber dispensers, renewed every 6 weeks, are suitable for accurately monitoring male H. marginata flights. Keywords: baited lures; cereal pest; non2yl butanoate; rubber septa; semiochemicals; dispenser. Highlights: A slow-release dispenser for H. marginata, rubber septa, was developed. Dispensers were loaded with 5 mg or 10 mg of non-2-yl butanoate. Dispenser release were initially measured under laboratory conditions. Pheromone loadings and use durations of the dispensers were assessed in the field. Specifically baited traps attracted large numbers of H. marginata males in the field. Introduction Between 2010 and 2012, outbreaks of saddle gall Haplodiplosis marginata (von Roser, 1840) (Diptera; Cecidomyiidae) occurred in Belgium and several other countries, including France, The Netherlands and the United Kingdom (Roberts et al., 2012; Censier et al., 2014a). The population dynamics of this European pest of cereals are rather enigmatic, with outbreak periods being interrupted by latency phases that can sometimes last up to several decades. In Belgium, for example, prior to 2010, damage by H. marginata had not been reported since the 1970s (De Clercq and D’Herde, 1972; Latteur, 1972; Skuhravý et al., 1983). As this insect is trial
Censier,%20Heuskin%20et%20al.%202015%20Crop%20Prot%20-%20R3.docx