Species Details

Sitona flavescens

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

SeasonalityMigration occurs in spring, with peak activity in April/May and September (Culik and Weaver 1994). IdentificationHas no setae. Lower third of rostrum is shallowly bisulcate. Has a distinct, weakly elevated, longutidual carnia that blends into the frontal groove. Eyes are convex. Pronotum is widest in the middle, sides are arcuate, anterior constriction line is not evident. Anterior constriction line on the ventral surface is evident about halfway between the coxae and the anterior of the prosternum. Sides of elytra are arcuate. Discal interstriae are 5 to 6 times wider than the striae. Vestiture of elytra has many flat, recumbent scales that are intermixed sparsely with very narrow scales. Most scales are golden or reddish. (Adapted from Bright 1994, Bright and Bouchard 2008).

Scientific Name Sitona flavescens Seasonality Migration occurs in spring, with peak activity in April/May and September (Culik and Weaver 1994). Identification
Has no setae. Lower third of rostrum is shallowly bisulcate. Has a distinct, weakly elevated, longutidual carnia that blends into the frontal groove. Eyes are convex. Pronotum is widest in the middle, sides are…
Has no setae. Lower third of rostrum is shallowly bisulcate. Has a distinct, weakly elevated, longutidual carnia that blends into the frontal groove. Eyes are convex. Pronotum is widest in the middle, sides are arcuate, anterior constriction line is not evident. Anterior constriction line on the ventral surface is evident about halfway between the coxae and the anterior of the prosternum. Sides of elytra are arcuate. Discal interstriae are 5 to 6 times wider than the striae. Vestiture of elytra has many flat, recumbent scales that are intermixed sparsely with very narrow scales. Most scales are golden or reddish. (Adapted from Bright 1994, Bright and Bouchard 2008).
Life History
Both adult weevils and eggs are able to overwinter (Davidson and Lyon 1979, Campbell et al. 1989). Eggs deposited in the spring have an incubation period of one week, depending on ambient conditions (Davidson and Lyon…
Both adult weevils and eggs are able to overwinter (Davidson and Lyon 1979, Campbell et al. 1989). Eggs deposited in the spring have an incubation period of one week, depending on ambient conditions (Davidson and Lyon 1979, Campbell et al. 1989). Larvae consume the root nodules at early instars and the root tissue, including the tap root at later instars (Davidson and Lyon 1979). New generation adults emerge in June and July and feed on green legume foliage, leaving crescent shaped feeding notches on leaf margins (Davidson and Lyon 1979, Campbell et al. 1989). The life span, on average, is one year (Davidson and Lyon 1979, Campbell et al. 1989).
Conservation Abundance of this pest species is variable over time and space (Campbell et al. 1989). Diet Info
In North America and Europe, larvae and adults of this weevil arre commonly found on a number of legume species, including clover species and alfalfa (Murray and Clements 1994, Murray and Clements 1995). Adults feed…
In North America and Europe, larvae and adults of this weevil arre commonly found on a number of legume species, including clover species and alfalfa (Murray and Clements 1994, Murray and Clements 1995). Adults feed on the edges of leaves while larvae feed in and on root nodules and roots, and girdling has been recorded (Davidson and Lyon 1979, Campbell et al. 1989).
Range
This weevil has been reported in the southern regions of all Canadian provinces, generally south of 50° latitude (Bright and Bouchard 2008). It also occurs in most of the United States, including California, New…
This weevil has been reported in the southern regions of all Canadian provinces, generally south of 50° latitude (Bright and Bouchard 2008). It also occurs in most of the United States, including California, New Mexico and North Carolina (Davidson and Lyon 1979, Bright and Bouchard 2008). It is believed to have been introduced from Europe, where it is widespread (Campbell et al. 1989).

Citation

Page Citation for Sitona flavescens

Page Citation

"Sitona flavescens, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-31242. Accessed 06 May. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Coleoptera Suborder Polyphaga Family Curculionidae Genus Sitona Species Sitona flavescens
This hierarchy is created from our museum records, it may not always accurately reflect modern taxonomies.

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum