Bug FAQSweetclover weevil
Sitona cylindricollis · Order: Coleoptera · Family: Curculionidae
Also called: Sweet clover weevil, Weevil
Source: Wikipedia
The sweetclover weevil is found in North America and is a pest of sweetclover and alfalfa.
Source: Wikipedia
How to recognize it
It is known as a pest of sweetclover and alfalfa in North America.
Source: Wikipedia
Is it a pest in the house?
It is considered a pest of sweetclover and alfalfa in North America.
Source: Wikipedia
Where it lives
It lives in North America where sweetclover and alfalfa are grown.
Source: Wikipedia
What it eats
Larvae eat the root nodules of sweetclover and alfalfa.
Source: Wikipedia
Life cycle
After feeding on root nodules, the larvae pupate near the soil surface.
Source: Wikipedia
Where it comes from
Its native range is North America.
Source: Wikipedia
Where it is found in the US
Recorded in 33 of 51 states and DC. Most records: Illinois, Minnesota, Colorado, South Dakota, Pennsylvania, Michigan, Massachusetts, Nebraska.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: introduced in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
How does the sweetclover weevil damage crops?
Its larvae feed on the root nodules of sweetclover and alfalfa, reducing plant health.
Source: Wikipedia
Same family (Curculionidae)
Green Immigrant Leaf WeevilPolydrusus formosusDamages trees, gardens or crops
Black Vine WeevilOtiorhynchus sulcatusDamages trees, gardens or crops
Nettle weevilPhyllobius pomaceusDamages trees, gardens or crops
Asian Oak WeevilCyrtepistomus castaneusDamages trees, gardens or crops
Strawberry Root WeevilOtiorhynchus ovatusDamages trees, gardens or crops
Common Leaf WeevilPhyllobius pyriDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Sitona_cylindricollis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.