An aphid-monitoring network in southeast Idaho enhanced by molecular detection of vectored plant pathogens
Date & Time
Tuesday, July 19, 2022, 3:15 PM - 5:15 PM

Monitoring winged arthropods can help growers make timely decisions regarding management of arthropod-vectored plant pathogens. To fulfill grower demand in developing an aphid monitoring network, specifically for Idaho seed potato growers, we deployed yellow pan traps (2-gallon buckets) across southeast Idaho in 2019-2021. Captured arthropods were collected weekly by university personnel, growers and industry cooperators. Number of winged aphids were counted, and results were reported via email to users and posted to multiple websites. At selected sites, nucleic acids were bulk extracted from all arthropods trapped and subjected to molecular assays designed to detect vectored pathogens important to southeast Idaho (for example, Potato virus Y). We monitored 33, 32, and 29 sites in 2019, 2020 and 2021, respectively. The number of aphids captured and timing of peak flights varied from year to year and from location to location within years. Preliminary taxonomic identification of aphids suggests the predominant aphid species also varied among years and locations. The apparent complexity of aphid flights in southeast Idaho may be driven by many factors, such as nearby agronomic activities, non-crop hosts, climate, and predatory/prey cycles. Growers use this monitoring network to inform timing of applicable management practices related to damage that may be caused by aphids alone or by the pathogens they vector.

Session Type
Parent Session