When they’re being eaten, bean plants release chemicals that draw in parasitic wasps.
https://www.science.org/doi/10.1126/sciadv.aec3229
A plant immune receptor mediates tritrophic interactions by linking caterpillar detection to predator recruitment
Lawn grass does the same thing. That’s what that freshly cut grass smell is, its to attract predatory insects.
Lawnmowers must be such a cock tease for them.