Curculionidae

Miller, Daniel R., 2025, Relative effects of black, purple, and green multiple-funnel traps on catches of arboreal and saproxylic beetles in forest understoreys, The Canadian Entomologist (e 6) 157, pp. 1-19 : 9-13

Curculionidae

There were sufficient numbers (in at least one experiment) of 19 species of Curculionidae for analyses ( Table 2). Trap colour affected catches of 12 species, although effects were inconsistent between experiments for five species ( Table 4). Catches of Cnestus mutilatus in experiment 3 and Cossonus corticola Say in experiment 2 were greater in purple traps than in black traps ( Fig. 2F, G ); catches of Cossonus corticola were lower in green traps than in black and purple traps ( Fig. 2G ). Trap catches in purple and black traps were greater than those in green traps for the following species: Dendroctonus terebrans (Olivier) in experiment 4 ( Fig. 2H ); Dryoxylon onoharaense

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(Murayama) in experiments 1 and 4 ( Fig. 2I, J ); Ips avulsus and Ips calligraphus (Germar) in experiment 2 ( Fig. 2L, M ); Stenoscelis brevis (Boheman) in experiments 3 and 4 ( Fig. 2Q, R ); Xyleborinus saxesenii (Ratzeburg) in experiment 3 ( Fig. 2S ); and Xylosandrus crassiusculus in experiment 1 ( Fig. 2T ). In experiment 4, catches of Hylobius pales (Herbst) were greater in black traps than in green and purple traps ( Fig. 2K ). Trap catches in purple traps were greater than those in green traps for Ips grandicollis in experiments 2 and 4 ( Fig. 2N, O ) and for Monarthrum mali (Fitch) in experiment 3 ( Fig. 2P ).

In contrast, trap colour had no effect on catches of Dendroctonus terebrans and Hylobius pales in experiment 2, Monarthrum mali in experiment 4, Xyleborinus saxesenii in experiments 1 and 4, and Xylosandrus crassiusculus in experiments 3 and 4 ( Table 4). Similarly, trap colour did not

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weevils ( Coleoptera : Curculionidae ) in experiments (Exp) 1 – 4, with mean ± standard error trap catches for those species unaffected by trap colour. df = 2,14 for experiments 1 and 2; df = 2,18 for experiments 3 and 4. Experiment details are

provided in Table 1.

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df = 2,14 for experiments 1 and 2; df = 2,18 for experiments 3 and 4. Experiment details are provided in Table 1.

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affect catches of the following species in any experiment: Gnathotrichus materiarius (Fitch) , Hylastes porculus Eichhoff , Hylastes tenuis Eichhoff , and Orthotomicus caelatus (Eichhoff) (experiment 4); Hylastes species (experiment 2), Pachylobius picivorus (Germar) (experiments 2 and 4), and Xylosandrus compactus (Eichhoff) (experiment 3; Table 4).

Figures

Figure 2. Mean (standard error) trap catches of the Cerambycidae A, Cyrtophorus verrucosus; B, Monochamus titillator; C, Neoclytus acuminatus; and D, E, Neoclytus mucronatus; and of the Curculionidae: F, Cnestus mutilates; G, Cossonus corticola; H, Dendroctonus terebrans; I, J, Dryoxylon onoharaense; K, Hylobius pales; L, Ips avulsus; M, Ips calligraphus; N, O, Ips grandicollis; P, Monarthrum mali; Q, R, Stenoscelis brevis; S, Xyleborinus saxesenii; and T, Xylosandrus crassiusculus in green, purple, and black multiple-funnel traps across experiments 1–4. Means for a species within an experiment followed by the same letter are not significantly different at P = 0.05 (Holm–Sidak test). Experiment details are provided in Table 1. Results of statistical analyses are presented in Tables 3 and 4.