Western Region IPM Ant Workshop University of California, Riverside August 20-21, 2008 Laurel D. Hansen Spokane Falls Community College
Research and extension priorities for ant management Identification/Education Management personnel/ technicians/homeowners
Identification/biology/seasonal applications 1. Control of swarmers 2. Ants in winter months
Velvety tree ants Liometopum occidentale L. luctuosum
Large infestations
Research: Velvety tree ants Biology Behavior Distribution Management
Odorous house ant: 3 mm Velvety tree ant, L. occidentale: mm Velvety tree ant, (pine tree ant) L. luctuosum: mm
Odorous House Ants Tapinoma sessile Research: WDO or nuisance Natural habitats Chemical/cultural management
Pavement ants Tetramorium caespitum Tetramorium sp. E
Research: Seasonal Control Winged forms emerging in structures Slab construction Activity in winter months
Moisture/cornfield ants Lasius spp.
Research: Species: WDO/nuisance Management with removal of wood? Injection techniques for buried wood?
Carpenter ants Camponotus spp.
Research: Seasonal management Reproductives in structures in winter Wall injection at emerging sites vs full drill/inject treatment with liquid or dust
December/January
Research: (continued) Spot/partial treatment vs full perimeter sprays Label directions: ? up and ? feet out Equipment: power vs hand held
Baits
Use of baits Labor intensive: seasonal-foragers only Transfer of material Combination with other treatments Problem: Competition with natural foods or bait acceptance
Inspections: More emphasis on inspections: Initial plus follow-up Replace regular service calls with inspections Education of clients Change is good