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
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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.
Learned about kairomones for the first time in the past month or two, it feels like an explosion of biological possibility opening up.
