Learning‐induced switching costs in a parasitoid can maintain diversity of host aphid phenotypes although biocontrol is destabilised under abiotic stress

Publish date: 
Monday, 2nd March 2020
Parisitoid wasp ovipositing in an aphid

A recent paper shows that a ‘switching penalty’ incurred by parasitoids searching for host aphids could explain stable coexistence of parasitism-resistant and -susceptible aphid phenotypes in the population. The study highlights the importance of understanding diversity within aphid populations and how this influences the efficacy of aphid biocontrol by parasitoid wasps.