Kauaʻi record · KCA-IA-00166
Daylily Aphid
Myzus hemerocallis
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About Daylily Aphid
Daylily Aphid (Myzus hemerocallis) is a member of Aphididae in the order Hemiptera. Its recorded origin status on Kauaʻi is introduced.
Daylily aphid (Myzus hemerocallis) is an introduced aphid documented from Kauaʻi. It is closely associated with daylilies, where pale green colonies feed deep between leaves and on soft growth, leaving cast skins and sticky honeydew. Like many aphids in mild climates, populations can increase rapidly through repeated live-bearing generations, although the full seasonal cycle on Kauaʻi has not been documented.
Kauaʻi occurrence evidence: Matsunaga, Howarth & Kumashiro (2019) Table 1 includes Kauaʻi island code 'Ka'; first-detection year shown as 2003; reported island distribution: Ka, Oa.
The cited occurrence evidence does not by itself establish current abundance or population trend on Kauaʻi.
Life cycle
Nymphs and winged/wingless adults; in mild conditions aphids can reproduce rapidly by parthenogenetic live birth. Kauaʻi sexual-stage biology is unresolved.
Habitat
Daylily plantings, nurseries and gardens.
Food and ecological role
Phloem sap from daylilies (Hemerocallis), with colonies often sheltered between leaves.
Reproduction
Repeated clonal generations can occur under favorable conditions; species-specific Kauaʻi seasonality is not resolved.
Movement
Winged forms can disperse among plantings; infested nursery stock can move colonies.
Ecosystem role
Introduced ornamental-plant sap feeder and honeydew producer.
Threats and impacts
Can reduce ornamental quality and create honeydew/sooty-mold problems; no broader Kauaʻi ecological impact is established.
Monitoring
Inspect leaf bases and sheltered new growth on daylilies; record winged forms, cast skins, honeydew and natural enemies.
Names and classification
- Scientific name
- Myzus hemerocallis
- Common names
- Daylily Aphid
- 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
- Daylily Aphid (Myzus hemerocallis) is a member of Aphididae in the order Hemiptera. Its recorded origin status on Kauaʻi is introduced.