Concentration mean values (scatter) of root VOCs consistently released by oak roots.

As measured in 10 cm distance to feeding-damaged oak roots in original soil.As measured to be released by washed oak roots (undamaged, mechanically damaged, feeding-damaged).As lowest concentration stimulating the white grub antenna.As measured in the center of the choice-test arena within the first hour of experiment.1Purity checked by gas chromatography-mass spectrometry, deviations from label given in brackets.2Compounds released by Quercus spec. roots under special circumstances.apassive sampling by SPME (n = 3).bactive sampling by TDS (n = 5).cactive sampling by CLSA (n = 9).dcalculated from vapour pressure based on Yaws CL (2007) The Yaws Handbook of Vapor Pressure. Houston: Gulf Publishing Company and based on SciFinder® database https://scifinder.cas.org.°Racemic Mixture;n.d. not detectedDifferent letters indicate significant differences,*:P**:P***:P