Fig. 9 in Behavioral responses of Aphis citricola (Hemiptera: Aphididae) and its natural enemy Harmonia axyridis (Coleoptera: Coccinellidae) to non-host plant volatiles

Fig. 9. An Aphis citricola infestation model showing the effects of aromatic plant volatiles. Solid arrows refer to positive effects. Dotted lines refer to negative effect. The thickness of the arrows indicates the magnitude of the effects. The model includes data from this study and the studies by Song et al. (2013) and Chen et al (2014).