We know that Lygus feed on and
reproduce in guayule. We also know that there is little
measurable damage to the plant by this insect (so much
like with alfalfa, the guayule grower is unlikely to spray
this potential cotton pest).
We did not have a lot of areas where we could test the
influence of guayule; however, when we found an effect,
it was serving as a sink for Lygus, sopping them up like a
sponge from nearby habitat & protecting cotton, though
usually over only a short range.