Bug FAQMimosa Webworm Moth
Homadaula anisocentra · Order: Lepidoptera · Family: Galacticidae
Also called: Mimosa webworm
Source: Wikipedia
Adult Mimosa Webworm Moths are about 10 mm long and silvery-gray with tiny black dots on their wings. The larvae grow to roughly 15 mm and feed on the leaves of mimosa and honeylocust, harming ornamental plants.
Source: Wikipedia
How to recognize it
They are silvery gray and their wings are dotted with small black spots.
Source: Wikipedia
Size
Adults measure about 10 mm (0.4 in) in length. Larvae reach about 15 mm (0.6 in) long.
Source: Wikipedia
Is it a pest in the house?
It is regarded as a pest of ornamental garden plants. It damages the foliage of mimosa and honeylocust trees.
Source: Wikipedia
Where it lives
They are considered pests of ornamental plants.
Source: Wikipedia
What it eats
Both adults and larvae feed on mimosa and honeylocust leaves.
Source: Wikipedia
Life cycle
Larvae typically appear after the accumulation of about 543 growing degree-days.
Source: Wikipedia
When you see it
The first larval occurrence is linked to 543 growing degree-days.
Source: Wikipedia
Where it is found in the US
Recorded in 28 of 51 states and DC. Most records: Mississippi, Ohio, Maryland, Oklahoma, Georgia, Virginia, Illinois, Pennsylvania.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: introduced in United States; introduced in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
What plants does the Mimosa Webworm Moth damage?
It feeds on the leaves of mimosa and honeylocust, harming those ornamental trees.
Source: Wikipedia
When do the larvae first appear?
Larvae usually show up after about 543 growing degree-days have accumulated.
Source: Wikipedia
How big are the adults and larvae?
Adults are about 10 mm long, while larvae grow to roughly 15 mm.
Source: Wikipedia
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Homadaula_anisocentra
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.