Host‐adapted aphid populations differ in their migratory patterns and capacity to colonize crops

摘要: Summary Although phytophagous insects can vary genetically in host use and exhibit long-range movements, the combined implications of these phenomena for pest management have received limited attention. To address this, we surveyed genetic diversity pea aphid Acyrthosiphon pisum using twelve microsatellite loci assessed association patterns annual movement from a putative source region (Columbia River Basin) to Palouse northern Idaho western Washington, where is Pisum sativum. A total 320 identified unique genotypes clustered into four groups, with two plant associations: alfalfa Medicago sativa (three groups), sativum vetch Vicia villosa (one group). All groups occurred Columbia Basin migrant aphids collected pan traps during spring colonization 2 years this study. Patterns group arrival on were spatially structured early season, consistent differing migration patterns. Despite migrants, single became predominant crops each year. Clonal laboratory colonies established field-collected specimens representing exhibited reciprocal performance trade-offs, being poor pea-associated genotype vice versa. Synthesis applications. Annual migrants production are diverse, different affinities origination populations Basin. As season progresses, adapted becomes crop. Management will be improved by monitoring temporal spatial variation specific arriving as immigrants crop providing information producers adjusting estimates risk damage accordingly. The principle could apply other species host-adapted that colonize an basis.