Uroleucon nigrotuberculatum

(Olive, 1963)

red goldenrod aphid

Uroleucon nigrotuberculatum, commonly known as the red goldenrod , is a North American aphid introduced to Japan. In its native range, it is a feeder on Solidago (goldenrod) species. Following introduction to Japan, this aphid has demonstrated remarkable dietary flexibility, expanding its range to include multiple plant species beyond its native specialization. The species exhibits complex ecological interactions, including -mediated relationships with gall-forming flies and serves as prey for various native and in its introduced range.

Uroleucon nigrotuberculatum on both Solidago canadensis2020 by Phonon.b. Used under a CC BY-SA 4.0 license.

Red aphids on the grass - 1 by KKPCW. Used under a CC BY-SA 4.0 license.

Scymninae larva and red aphides on the grass - 1 by Kyu3. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Uroleucon nigrotuberculatum: /ˌjʊəroʊˈljuːkɒn ˌnɪgroʊˌtjuːbərkjʊˈlɑːtəm/

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

Identification

Red coloration distinguishes this from many . Diagnostic morphological features include characteristic tubercular structures referenced in the species epithet. In Japan, molecular and morphological examination confirms identity through clustering with native North American on Solidago altissima.

Images

Habitat

Associated with open field-type in both native and introduced ranges. In native North America, tightly linked to goldenrod-dominated . In Japan, occupies agricultural landscapes and areas with introduced Solidago canadensis and other Asteraceae.

Distribution

Native to North America. Introduced to Japan, where established occur on Hokkaido Island and the main island. GBIF records confirm presence in Japan.

Seasonality

Seasonal fluctuations documented in northern Japanese between 2003–2004 and 2015–2016, indicating ongoing in introduced range. Specific seasonal patterns not detailed in available sources.

Diet

Phloem feeder. Native range: on Solidago (goldenrods), particularly Solidago altissima and S. canadensis. Introduced range: expanded utilization documented on Solidago gigantea, Taraxacum officinale, Senecio vulgaris, and Sonchus asper.

Host Associations

Solidago altissima - primary native tall goldenrod; association in native range
Solidago canadensis - Canada goldenrod; widespread in Japanese agricultural landscapes
Solidago gigantea - confirmed in Japanese inoculation experiments
Taraxacum officinale - dandelion; in introduced range
Senecio vulgaris - common groundsel; in introduced range
Sonchus asper - prickly sow-thistle; in introduced range
Eurosta solidaginis - indirect ecological interactiongall fly induces changes in goldenrod that attract this

Behavior

Exhibits collective defense including synchronized twitching and kicking response (CTKR) when colonies are disturbed. This coordinated movement may reduce successful attacks by small parasitic . Volatile organic compound emissions from honeydew may attract and .

Ecological Role

In native range, herbivore on goldenrods with potential to influence plant dynamics. In introduced Japan, with expanded range. Serves as prey for native primary (Ephedrus plagiator, Praon yomenae, Aphelinus albipodus) and hyperparasitoids. Acts as food source for including Harmonia axyridis, though nutritional quality appears poor for this lady beetle. Facilitates predator and parasitoid community assembly in invaded .

Human Relevance

pest in Japan with potential agricultural and ecological impacts due to range expansion. Poor nutritional quality for some agents (e.g., Harmonia axyridis) may complicate management strategies.

Similar Taxa

Uroleucon ambrosiaecongeneric with similar and ; distinguished by associations and geographic distribution
Other Uroleucon species on Solidagomorphological examination required for definitive identification; molecular may be necessary in introduced ranges where shifts occur

More Details

Semiochemical ecology

Research demonstrates that U. nigrotuberculatum distribution is influenced by plant volatile compounds, particularly β-farnesene, which is induced in goldenrod plants by the gall fly Eurosta solidaginis. This -mediated relationship represents a complex tritrophic interaction.

Genetic uniformity in introduced range

Phylogenetic analysis of Japanese reveals no genetic variation among aphids collected from different plant , all clustering with North American S. altissima populations. This suggests recent expansion without genetic differentiation.

Parasitoid community

In Japan, attacked by three primary and eight hyperparasitoid species. The hyperparasitoid resembles that of other open-field aphids in Japan, indicating integration into native .