Cossula magnifica

Strecker, 1876

pecan carpenterworm moth

Cossula magnifica, commonly known as the pecan , is a of carpenter moth in the . The species is found in the southeastern United States, where its develop as borers in hardwood trees. are active in spring and early summer. The species is of some economic concern due to larval damage to pecan and other Carya species.

Cossula magnifica by (c) Laura Gaudette, some rights reserved (CC BY), uploaded by Laura Gaudette. Used under a CC-BY license.

Pronunciation

How to pronounce Cossula magnifica: /kɔsˈsuːlə mæɡˈnɪfɪkə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The can be distinguished from other southeastern by a combination of geographic range, period (March to June), and association with Carya plants. Within the Cossula, specific identification typically requires examination of or detailed pattern analysis. The 'pecan ' reflects its primary host association, which can aid in field identification where pecan is present.

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Habitat

Associated with deciduous hardwood forests and orchards, particularly where Carya (hickories and pecans) occur. Larval is within the wood of living or recently dead trees.

Distribution

Southeastern United States: North Carolina south to Florida, west to Mississippi and Texas.

Seasonality

are on from March to June, with exact timing varying by location within the range.

Diet

feed internally on the wood of Carya , including Carya illinoinensis (pecan). Larvae have also been recorded from Diospyros (persimmons) and Quercus (oaks). do not feed.

Host Associations

  • Carya illinoinensis - larval pecan, primary giving rise to
  • Carya - larval hickories in general
  • Diospyros - larval persimmons
  • Quercus - larval oaks

Life Cycle

with four stages: , , , and . Larvae are wood-borers that tunnel through tree wood, likely requiring multiple years to complete development given the hard wood substrate and cossid patterns. occurs within the larval tunnel. Adults emerge in spring.

Behavior

are or . are concealed feeders within wood, making them difficult to detect until exit holes or indicate their presence.

Ecological Role

act as primary consumers of hardwood tissue, contributing to and creating internal cavities in trees. In natural forests, this is a normal ecological ; in pecan orchards, it constitutes a pest interaction.

Human Relevance

The is a minor pest of pecan orchards, where larval tunneling can reduce tree vigor and nut production. Damage is generally localized and rarely causes tree mortality. The species is not considered a major economic pest compared to other pecan .

Similar Taxa

  • Other Cossula speciesSame , requiring or detailed pattern examination for separation
  • Other Cossidae in the southeastern USSimilar and wood-boring larval habit; association and geographic range help distinguish C. magnifica

More Details

Taxonomic history

Described by Strecker in 1876. The has remained in the Cossula without significant taxonomic revision.

Collection records

iNaturalist records (626 observations as of source date) confirm the documented range and suggest the is regularly encountered by observers in the southeastern United States during the period.

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Sources and further reading