Kauaʻi record · KCA-IA-00154
Aphis coreopsidis
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About Aphis coreopsidis
Aphis coreopsidis is a member of Aphididae in the order Hemiptera. Its recorded origin status on Kauaʻi is introduced.
Aphis coreopsidis is an introduced aphid documented from Kauaʻi. It is a sap feeder recorded from many members of the sunflower family, including Bidens, Coreopsis, Eupatorium and related plants, with additional hosts reported elsewhere. On Kauaʻi its local host use, seasonal abundance, and effects on native versus introduced Asteraceae should be documented rather than inferred from mainland records.
Kauaʻi occurrence evidence: Matsunaga, Howarth & Kumashiro (2019) Table 1 includes Kauaʻi island code 'Ka'; first-detection year shown as 2004; reported island distribution: Ka, Ma, Mo, Oa.
The cited occurrence evidence does not by itself establish current abundance or population trend on Kauaʻi.
Life cycle
Aphid development consists of live-born nymphs maturing into wingless or winged adults during parthenogenetic generations; sexual stages vary geographically and the Kauaʻi cycle is not documented in the sources used here.
Habitat
Vegetation bearing suitable host plants, especially Asteraceae such as Bidens and Coreopsis.
Food and ecological role
Phloem sap; host records are concentrated on Asteraceae, with Bidens and Coreopsis among documented hosts.
Reproduction
Rapid clonal reproduction is typical of aphids during favorable conditions; Kauaʻi-specific sexual/overwintering stages are unresolved.
Movement
Winged adults disperse among host plants; infested plant material can assist spread.
Ecosystem role
Introduced plant sap feeder and honeydew producer.
Threats and impacts
Potential for localized plant stress and honeydew/sooty mold at high densities; no major Kauaʻi impact is established.
Monitoring
Record exact host plant, colony density, winged forms, ant attendance and natural enemies; native Bidens associations would be particularly informative.
Names and classification
- Scientific name
- Aphis coreopsidis
- Family
- Aphididae
- Order
- Hemiptera
- Record type
- species
Kauaʻi occurrence and status
- Kauaʻi occurrence
- Present
- Origin
- Introduced
- Conservation status
- Not assessed
Process and seasonal context
- Seasonal description
- Aphis coreopsidis is a member of Aphididae in the order Hemiptera. Its recorded origin status on Kauaʻi is introduced.