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Argentine Ant
How to Manage Pests
Key to Identifying Common Household Ants
Argentine ant Linepithema humile
Subfamily: Dolichodorinae
Identifying
characteristics
- Workers are all the same size, small, 1/8-inch long
- Uniformly dull brown
- Petiole with 1 erect node
- Thorax uneven in shape when
viewed from side
- Musty odor emitted when crushed
Behavior
- Feed on sweets, fresh fruit,
and buds of some plants
- Tend honeydew-producing species
- Forage for sweets and oils in homes
- Travel rapidly in distinctive trails along sidewalks,
up sides of buildings, along branches of trees and shrubs,
along baseboards, and under edges of carpets
- Colonies may split in spring and summer when queen and
workers move to new site; not antagonistic toward each
other
Nest type and size
- Outdoors in soil, under wood, slabs, debris, mulch, or
in branches and cavities of trees and shrubs
- Shallow, 1- to 2-inch deep mounds in open, often disturbed
habitats, either moist or dry
- Millions of ants per colony with
multiple queens and many subcolonies
See also, Argentine ant quick management
tips.
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