Euxoa scandens

(Riley, 1869)

white cutworm, white cutworm moth

Euxoa scandens, commonly known as the white , is a noctuid native to North America. It is recognized as a sporadic agricultural pest, particularly affecting tobacco in Quebec, asparagus in Michigan, and various vegetable crops grown in light sandy soils. The exhibits a with larvae and resuming feeding in spring, causing significant damage to young plants. moths emerge and oviposit from late June through late July. Research has focused on developing female -based monitoring systems to improve management of this pest.

Euxoa scandens by (c) Doug Macaulay, some rights reserved (CC BY), uploaded by Doug Macaulay. Used under a CC-BY license.

CATALOGUE-BM-PLATE LXXIV by Sir GEORGE F. HAMPSON, Bart.. Used under a Public domain license.

Euxoa scandens by Louis Imbeau. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Euxoa scandens: //juːkˈsoʊ.ə ˈskæn.dɛnz//

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Identification

Euxoa scandens belongs to the dart moth Euxoa, characterized by stout-bodied with typically dull, cryptic coloration. As a , larvae are likely smooth, cylindrical, and exhibit the typical "C-shaped" defensive curling when disturbed common to the genus. Specific diagnostic features distinguishing E. scandens from are not documented in available sources; accurate identification may require examination of genitalia or molecular methods. The "white cutworm" suggests pale larval coloration, though this is not explicitly confirmed.

Images

Habitat

Associated with light sandy soils, particularly in agricultural settings. The is documented as a pest in cultivated fields including tobacco, asparagus, and vegetable crops.

Distribution

North America, with confirmed records from Canada (Quebec, Alberta, Manitoba, Saskatchewan) and the United States (Michigan). The MONA/Hodges number 10715 indicates its inclusion in North American faunal lists.

Seasonality

emerge and oviposit from late June until late July. larvae overwinter and resume feeding in spring.

Diet

Larvae feed on tobacco, asparagus, and other vegetable crops. The is described as a sporadic pest of these cultivated plants.

Host Associations

tobacco - larval food plantDocumented as sporadic pest in Quebec
asparagus - larval food plantDocumented as sporadic pest in Michigan
vegetable crops - larval food plantGrown in light sandy soils

Life Cycle

larvae overwinter, causing serious damage when they resume feeding in spring. emerge and oviposit from late June until late July, suggesting a single per year.

Behavior

Larvae are likely feeders, consistent with habits. When disturbed, Euxoa larvae typically coil into a tight "C" shape as a defensive response. Female produce a that has been evaluated for use in monitoring.

Ecological Role

Sporadic agricultural pest; no documented natural role. Potential prey for and , though specific associations are not recorded.

Human Relevance

Agricultural pest of economic concern for tobacco, asparagus, and vegetable production. Research has focused on developing -based monitoring tools to improve timing of applications and estimate size and distribution.

Similar Taxa

Euxoa auxiliaris, also a Noctuidae pest with similar larval habits and agricultural damage, but differs in distribution (western North America), (cereal grains, alfalfa), and ( migrate to alpine areas to aestivate)
Euxoa mimallonisRuddy-winged dart, congeneric with similar but differs in associations and is not documented as a significant agricultural pest

More Details

Research Focus

Scientific attention has concentrated on identification and field evaluation for monitoring purposes rather than comprehensive . The 1982 Canadian Entomologist paper by McLeod and Dupré represents the primary available source on this ' biology.

Taxonomic Note

First described by Riley in 1869. The is part of the large and taxonomically challenging Euxoa, which contains numerous similar species requiring careful identification.