Dasineura

Rondani, 1840

Dasineura is a of in the . in this genus are known for inducing on various plants, including woody shrubs and trees. Some species are significant agricultural pests, such as Dasineura jujubifolia on jujube, which can reduce yields by at least 20%. The genus exhibits diverse gall , from simple leaf galls to complex flower-like structures formed by developmental reprogramming of host tissues.

Dasineura by (c) Michael K. Oliver, some rights reserved (CC BY), uploaded by Michael K. Oliver. Used under a CC-BY license.

Dasineura communis by (c) gonodactylus, some rights reserved (CC BY), uploaded by gonodactylus. Used under a CC-BY license.

Dasineura carbonaria by (c) Michael K. Oliver, some rights reserved (CC BY), uploaded by Michael K. Oliver. Used under a CC-BY license.

Pronunciation

How to pronounce Dasineura: /ˌdæsɪˈnʊərə/

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Identification

Identification to level typically requires examination of on specific plants, morphometric analysis, or molecular methods. Some species are morphologically similar and distinguished primarily by host association and subtle morphological differences. Gall characteristics such as color, location on , and internal structure provide field identification cues.

Images

Habitat

occur in diverse including deciduous forests, grasslands, riparian corridors, and agricultural orchards. Specific habitat associations depend on distribution. For example, Dasineura investita occurs in mesic bluff base forests with wood nettle, while D. jujubifolia inhabits arid-zone jujube orchards in Xinjiang, China.

Distribution

Widespread distribution with records from Europe (Sweden, Denmark, Norway), Asia (China, South Korea, Japan), and North America (Vermont, United States). Specific have more restricted ranges; for example, Dasineura ingeris is known from Sweden, and D. jujubifolia from China and South Korea.

Seasonality

activity varies by and climate. In Hami, Xinjiang, Dasineura jujubifolia adults are active from April 20 to September 10, with 4–5 annually and a generation time of 19–24 days. Dasineura asteriae adults emerge in May in South Korea.

Diet

feed on tissues within induced . Specific feeding habits vary: Dasineura jujubifolia larvae feed on tender jujube leaves causing gall formation and leaf distortion; Dasineura asteriae larvae develop within flower-like galls on Aster scaber. do not feed or have limited feeding; some -associated studies document adult longevity on solution versus water.

Host Associations

Ziziphus jujuba - for Dasineura jujubifolia; and larval feeding on tender leaves
Aster scaber - for Dasineura asteriae; flower-like formation through developmental reprogramming
Salix viminalis - for Dasineura ingeris; damage and side shoot development
Crataegus monogyna - for Dasineura crataegi
Fraxinus excelsior - for Dasineura fraxinea
Laportea canadensis - for Dasineura investita; wood nettle

Life Cycle

with , larval, pupal, and stages. Larval development occurs within . Multiple per year in warmer climates; 4–5 generations annually for Dasineura jujubifolia in Xinjiang with 19–24 day generation time. may occur within galls or in soil depending on . strategies vary: D. jujubifolia may overwinter in fallen galls.

Behavior

females oviposit into tissues, triggering formation. induce characteristic gall through manipulation of plant developmental , including dedifferentiation of vegetative tissues into callus, activation of floral genes, and suppression of specific organ development genes. Some show tight temporal synchrony with host plant .

Ecological Role

-formers act as , with some reaching pest status in agriculture. Dasineura jujubifolia reduces jujube yields by at least 20% with rates up to 100%. The serves as for , including (Pseudotorymus samsatensis, Systasis parvula, Baryscapus adalia) and (Aprostocetus sp., Synopeas sp.), providing services in managed .

Human Relevance

Some are significant agricultural pests requiring management. Dasineura jujubifolia is a major pest of jujube in China and South Korea. Chemical control is common but causes , disrupts , and triggers . utilizing is an emerging management strategy. Other species are subjects of scientific interest for understanding - interactions and developmental biology.

Similar Taxa

RabdophagaAlso in ; some Dasineura were formerly classified in Rabdophaga (e.g., Dasineura schreiteri as Rabdophaga schreiteri). Distinguished by taxonomic revision and morphological analysis.
TaxodiomyiaAnother causing similar twig on conifers; Taxodiomyia cupressiananassa on bald cypress produces galls resembling rust , highlighting convergent gall across genera.
PhyllodiplosisRelated ; Phyllodiplosis jujubae also forms on jujube but produces pale galls distinguishable from the dark purplish-red galls of Dasineura jujubifolia.

More Details

Gall morphology and host manipulation

Dasineura asteriae demonstrates remarkable developmental manipulation, reprogramming floral in vegetative organs to create flower-like consisting solely of tepal-like leaflets with a specialized larval chamber. This involves dedifferentiation into callus, cytokinin regulation, and selective suppression of carpel development genes.

Agricultural impact

Dasineura jujubifolia exemplifies the economic significance of the . First recorded in China in 1966 and detected in South Korea in 2011, this has become a major pest of jujube orchards. causes leaf distortion, desiccation, and abscission, impairing . , particularly the Pseudotorymus samsatensis, show potential for .