How do biological control and hybridization affect enemy escape?
Biological Control. 2008. A. C. Blair and U. Schaffner and P. Häfliger and S. K. Meyer and R. A. Hufbauer
"Within the [North American] diffuse knapweed sites, approximately half of the plants surveyed were diffuse-like and half were hybrid-like." ---based on morphology alone
"[I]n laboratory preference tests L. minutus did not discriminate between individuals from North American admixed diffuse knapweed sites and European genetically 'pure' diffuse knapweed."
These are bad news bears for me guys. Mostly the first one... but still.
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