Rebecca L. Loughner, rll26@cornell.edu and Gregory M. English-Loeb, gme1@cornell.edu. NYSAES, Cornell University, Department of Entomology, Barton Lab, 620 W. North St, Geneva, NY
Strawberry sap beetle, Stelidota geminata (Say), is a serious arthropod pest of strawberry in the Northeast. The adults and larvae feed on and contaminate marketable fruit. Cultural practices were evaluated for their potential to reduce strawberry sap beetle (SSB) populations in three studies: 1) Baited traps were placed at three distances into strawberry fields to determine if adult entry into the field is gradual enough for an early season border spray to be effective, 2) Damage to berries contacting the ground and berries held in the air was compared by modifying plant structure and exposing caged plants to SSB adults, and 3) Impact of prompt versus delayed field renovation on the number of SSB emerging from strawberry for 5 weeks following renovation. Adult beetles were caught in the strawberries shortly after SSB were found in traps placed along edges of adjacent wooded areas, although no gradual progression of beetles across the strawberry fields was evident. Thus, beetles enter fields too quickly for a border spray to be effective. Berries held off the ground were less damaged than those in direct contact with the soil when SSB were present, suggesting that certain cultivars may have some role in reducing the amount of fruit accessible to SSB. More beetles emerged from strawberry plots renovated promptly than plots where renovation was delayed by one week. Overall, it seems the potential for reducing SSB populations by modifying cultural practices is limited.
Species 1: Coleoptera Nitidulidae
Stelidota geminata (strawberry sap beetle)
Keywords: Overwintering habitat, Field renovation
Recorded presentation