Herbivore-induced plant volatiles (HIPVs) serve as important cues for predators and parasitoids to locate prey or hosts. Although the response to HIPVs has been confirmed in many predatory species of the family Phytoseiidae, other groups of mesostigmatic mites remain unexplored. Blattisocius mali (Blattisociidae) is a polyphagous predator, reported mostly from soil, litter, compost piles, or stored products, but occasionally also found on plants. It readily feeds on the omnivorous and ubiquitous Tyrophagus putrescentiae, which, by occupying plants, not only injures them by consuming fragments of plant tissue but also secondarily infects them with pathogenic fungi, e.g., Fusarium sp., on which it, in turn, eagerly feeds. Using a Y-tube olfactometer, we examined whether female B. mali, which had previously experienced foraging on mite-infested plants, would respond to odours emitted from these plants: (1) leaves of cucumber seedlings infested with acarid mites, (2) lily bulbs infested with acarid mites and/or F. oxysporum (3) leaves or bulbs artificially wounded just before the experiment began. Blattisocus mali came from mass rearing on T. putrescentiae and wheat bran. After a several-day-long passage on infested plants, single predators were transferred to Munger cages lined with filter paper and supplemented with cucumber leaf fragments or lily bulb scales and were starved for 24 hours before the test began. Only those predators that, within up to 10 minutes, successfully reached the far end of one of the olfactometer arms were further subjected to statistical analysis (for each test, N=40 individuals). Predatory females highly preferred the odours from cucumber leaves injured by acarid mites to clean air or uninjured leaves. However, they did not discriminate between odours from artificially wounded and uninjured leaves. Similarly, predators were highly attracted to volatiles from lily bulbs infested by acarid mites or acarid mites and F. oxysporum to uninfested bulbs, but they did not discriminate between odours of wounded bulbs or bulbs infested by fungus alone and those from non-infested bulbs. Our results provide the first evidence that predatory soil mites respond to HIPVs emitted by both above- and below-ground plant parts, suggesting the potential for their odour-mediated interactions both on plants and in the soil. Foraging on plants, they may rely mostly on HIPVs, ignoring other signals associated with the presence/feeding of prey, such as odours emitted by mechanically injured plants or those infected with a pathogenic fungus that serves as food for the prey.