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Mint plants enable improvement of pest management by attracting herbivore enemies to constitutively released mint volatiles. The generalist predator  Nesidiocoris tenuis  is used worldwide to control agricultural pests, but little is known about whether mint can serve as a companion plant that attracts this predator. To examine this, olfactory responses of  N. tenuis  were assessed using apple mint, candy mint, and spearmint as odor sources. Of the volatiles released by these mint species, candy mint volatiles alone were more attractive than those from undamaged eggplant, and were as attractive as volatiles from eggplant damaged with  Spodoptera litura  larvae. However, no prominent preference for particular volatile(s) among the mint volatiles was shown by  O. strigicollis . When  N. tenuis  had been previously exposed to candy mint, the predator showed a stronger preference for candy mint volatiles than damaged eggplant volatiles. It was, however, irrelevant whether the predator received benefit or not by predating animal prey during the mint-experience period. In contrast, spearmint-experience increased the preference for spearmint volatiles only when the predator acquired prey during the mint-experience period. These findings suggest that previous exposure of  N. tenuis  to some particular mint species can increase its preference for volatiles from the conspecific mints.

Mint companion plants enhance the attraction of the generalist predator Nesidiocoris tenuis according to its experiences of conspecific mint volatiles