Desmia funeralis

Hübner

grape leaffolder, grape leaf-folder

, commonly known as the , is a in the Crambidae. It is a minor pest of grape vineyards across the United States, with larvae that feed on grape leaves, causing characteristic leaf folding or rolling damage. The is widely distributed from the southern United States through California, extending north to the northeastern states and southeastern Canada. Severe have occurred in localized areas, particularly when natural fail to control moth numbers.

Desmia funeralis by (c) Douglas Hooper, some rights reserved (CC BY), uploaded by Douglas Hooper. Used under a CC-BY license.

Desmia funeralis by Mike Boone. Used under a CC BY-SA 2.5 license.

Desmia funeralis according to Ken (14845538932) by Andy Reago & Chrissy McClarren. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Desmia funeralis: //ˈdɛs.mi.ə fjuː.nəˈrɑː.lɪs//

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 similar Crambidae by its association with grape plants and the distinctive leaf-folding of its larvae. moths are attracted to blacklighting displays and have been noted as among the most striking observed at moth night events. Specific adult morphological features distinguishing it from congeneric species are not detailed in available sources.

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Habitat

Vineyards and agricultural areas associated with grape . The is strongly tied to containing grape plants (Vitis spp.), which serve as the larval .

Distribution

Widely distributed across the southern United States to California, north to the northeastern states and southeastern Canada. Specific records exist from Alberta, Manitoba, and Saskatchewan in Canada, and Vermont in the United States.

Diet

Larvae feed exclusively on grape leaves (Vitis spp.), causing defoliation through leaf folding and rolling .

Host Associations

grape - larval plantVitis spp.; larvae feed on leaves causing characteristic folding damage

Behavior

Larvae exhibit leaf-folding or leaf-rolling while feeding on grape foliage. In Florida, damage is concentrated in September and October when vineyard spray programs are discontinued post-harvest. in California have been associated with failures of .

Ecological Role

Minor agricultural pest of grape crops. are significantly influenced by , which normally provide . Excessive larval defoliation can deplete food reserves in grape vines, potentially reducing the size of subsequent crops.

Human Relevance

Economic pest in grape vineyards, particularly problematic when practices are interrupted or when natural enemy are disrupted. Damage is most severe in late season when applications cease.

Similar Taxa

Desmia maculalisCongeneric potentially overlapping in range and ; specific distinguishing features not documented in available sources

More Details

Predation by mason wasps

caterpillars are documented prey of the four-toothed mason wasp (Monobia quadridens), a solitary that provisions its nests with paralyzed caterpillars. This represents a significant natural source of mortality for leaffolder larvae.

Taxonomic note

The iNaturalist database lists this as a 'complex,' suggesting potential cryptic diversity or unresolved boundaries within the group.