There is an urgent need in Europe to prepare resources for the arrival of the emerald ash borer, Agrilus planipennis (Buprestidae, Coleoptera) from European Russia, and possibly other invasive jewel beetles. A lightweight, easy to handle, non‐sticky trap could facilitate monitoring and detection to derive information about emerald ash borer and other jewel beetle populations. In two experiments carried out over two consecutive years in an oak forest, a new non‐sticky multi‐funnel trap design with a light‐green (sometimes described as fluorescent yellow) visual cue was developed. Altogether, there were 238 (2018) and 194 (2019) specimens captured often (2018) and eight (2019) Agrilus species, eight of which are oak‐related and one (A. convexicollis) was linked to ash. The new light‐green multi‐funnel trap performed similarly to the sticky design with a similar coloured surface. Our results suggest that the new trap design may be suitable for catching a wide range of buprestid species. It may also have the potential to be further optimized with respect to visual and olfactory cues, which would provide an even more useful tool for monitoring both invasive and indigenous buprestids.

In behavioural field experiments, we aimed to study the interchangeability of molecular structures, which only differ by single hydrogen, hydroxyl or methyl group from components of a known attractant blend of the flower damaging Epicometis hirta (Coleoptera, Scarabaeidae), and two other cetoniin occasional pests Cetonia aurata aurata and Potosia cuprea, typical to the fauna of Central and Southern Europe. Rac. 1‐phenethyl alcohol or methyl eugenol (of the known attractant blend of rac. 1‐phenethyl alcohol, (E)‐anethol and methyl eugenol) were replaced with structurally similar floral compounds widespread among plant families in general. All baited treatments caught significantly more of the three species compared with the unbaited control. The ternary blend containing 2‐phenethyl alcohol caught numerically the most of the three species and gave a significant increase compared with the basic blend with rac. 1‐phenethyl alcohol for C. a. aurata and E. hirta. Benzyl alcohol performed similarly well to 2‐phenethyl alcohol in catching C. a. aurata and P. cuprea, and it was superior to the blend with phenylacetaldehyde. On the contrary, for E. hirta, the treatment containing phenylacetaldehyde was better than the combination with benzyl alcohol, resulting in a similar effect to the blend with 2‐phenethyl alcohol. In another experiment, the known ternary blend including methyl eugenol performed numerically the best in attracting E. hirta compared with the blends with eugenol or isoeugenol, which results are congruent with the earlier findings on C. a. aurata and P. cuprea. Our work resulted in a single optimized attractant combination for all three cetoniin species that includes 2‐phenethyl alcohol, methyl eugenol and (E)‐anethol.