We tested the extent to which resistance of common bean (Phaseolus vulgaris) cultivars to the spider mite Tetranychus urticae
parallels the extent to which these plants display indirect defenses via the induced attraction of the predatory mite Phytoseiulus
persimilis. First, via field and greenhouse trials on 19 commercial bean cultivars, we selected two spider mite-resistant
(Naz and Ks41128) and two susceptible (Akthar and G11867) cultivars and measured the spider mite-induced volatiles and the
subsequently induced attraction of predatory mites via olfactory choice assays. The two major volatiles, 4,8,12-trimethyltrideca-1,3,7,11-tetraene
(TMTT) and (Z)-3-hexenyl-acetate, were induced in the resistant but not in the susceptible cultivars. However, uninfested
susceptible cultivars emitted these volatiles at levels similar to those of mite-infested resistant cultivars. Significant
induction of several minor components was observed for all four cultivars except for the infested-susceptible cultivar G11867.
Both, the spider mite-resistant cultivar Naz and the susceptible cultivar G11867, attracted more predatory mites when they
were infested. In contrast, spider mites induced increased emission of two major and five minor volatiles in Ks41128, but
predatory mites did not discriminate between infested and uninfested plants. Overall, the attraction of predatory mites appeared
to correlate positively with the presence of TMTT and (Z)-3-hexenyl acetate and negatively with β-caryophyllene and α-pinene
in the bean headspace. Taken together, our data suggest that resistance and attraction of natural enemies via induced volatiles
are independent traits. We argue that it should be possible to cross predator-attraction promoting traits into resistant cultivars
that lack sufficiently inducible indirect defenses.