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Table 3 Summary of the effects of synthetic compounds on trapped Medetera flies and Ips typographus beetles in the different arrangements (1–3) of experiment 2

From: Behavioral responses of predatory flies of the genus Medetera Fischer von Waldheim (Diptera: Dolichopodidae) and the tree-killing beetle Ips typographus L. (Coleoptera: Scolytinae) to odor compound blends

Arrangement 1 (df = 26)

Medetera specimens

I. typographus

Arrangement 2 (df = 66)

Medetera specimens

Arrangement 3 (df = 66)

Medetera specimens

MB

F = 0.65; P = 0.43

F = 3.6; P = 0.07

αT

F = 0.65; P = 0.42

αP

F = 0.73; P = 0.39

cV

F = 25.3; P < 0.001

F = 19.7; P < 0.001

Mtal

F = 1.42; P = 0.24

βP

F < 0.01; P = 0.96

tV

F = 0.09; P = 0.77

F = 0.09; P = 0.75

Vn

F = 0.51; P = 0.48

Cam

F < 0.01; P = 0.92

Id

F = 4.17; P = 0.05

F = 1.8; P = 0.18

GA

F = 0.41; P = 0.53

Terp

F = 0.14; P = 0.71

cV:MB

F = 0.08; P = 0.77

F = 0.02; P = 0.88

Vn: αT

F = 3.3; P = 0.07

αP:βP

F = 2.56; P = 0.11

cV:tV

F = 5.25; P = 0.03

F = 0.02; P = 0.87

Vn:Mtal

F = 1.19; P = 0.28

αP:Cam

F = 1.41; P = 0.24

cV:Id

F = 5.08; P = 0.03

F = 2.37; P = 0.13

Vn:GA

F = 1.16; P = 0.29

αP:Terp

F < 0.01; P = 0.95

  1. Arrangement 1 tested the effects of the bark beetle-produced compounds 2-methyl-3-buten-2-ol (MB), (–)-cis-verbenol (cV), ( +)-trans-verbenol (tV), and ( ±)-ipsdienol (Id), and the combination between cV:MB, cV:tV and cV:Id. Arrangement 2 tested the effects of compounds produced primarily by symbiotic microorganisms (–)-myrtenal (Mtal), verbenone (Vn), α-terpineol (αT), and geranyl acetone (GA), and the combination between Vn:αT, Vn:Mtal and Vn:GA. Arrangement 3 tested the effects of the tree-produced compounds ( ±)-α-pinene (αP), β-pinene (βP), camphene (Cam), and terpinolene (Terp), and the combination between αP:βP; αP:Cam and αP:Terp. Df-degrees of freedom, F-values indicate variation between samples, P < 0.05 indicates a significant difference between treatments. In arrangements 2 and 3, the data for I. typographus was not included due to the very low number of beetles collected by these synthetic blends