This scientific article presents a comprehensive ecological and genomic study of leafhopper–parasitoid interactions in Canadian strawberry farms. Researchers monitored leafhopper populations from 2023 to 2024, identified numerous genera, and noted the dominance of migratory species whose abundance was strongly influenced by temperature. A key finding was the first Canadian record of Dalbulus maidis, a corn pest likely introduced via long-distance dispersal. The study found that insecticide applications were largely ineffective, underscoring the need for alternative pest management strategies. Instead, parasitism by Gonatopus wasps was observed, with rates increasing under warmer conditions and later in the season, primarily targeting Macrosteles quadrilineatus. Genomic analyses further characterized parasitoid diversity, revealing at least three distinct Gonatopus species, and produced the first complete mitochondrial genome for the genus from the New World—laying crucial groundwork for climate-resilient, pesticide-free pest control approaches.https://www.biorxiv.org/content/10.1101/2025.08.23.671950v2