Large Walnut Aphid
Panaphis juglandis
This record describes Panaphis juglandis (species). Recorded family: Aphididae. Recorded order: Hemiptera.
Identification and Appearance
The fourth-instar nymph has transverse rows of brown patches on the dorsal abdomen. The adult alate is large and stout-bodied. It has a darkened head and thorax, and a yellow abdomen with dark brown transverse bands. The forewing veins are fuscous-bordered. May occur on European Walnut (Juglans regia) where it is present. Panaphis juglandis live on the upper sides of leaves of European Walnut in rows along the veins, and are sometimes ant-attended. Status in Britain is hard to determine due to lack of records. https://influentialpoints.com/Gallery/Panaphis_juglandis_Large_walnut_aphid.htm
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
- Suborder
- Sternorrhyncha
- Superfamily
- Aphidoidea
- Family
- Aphididae (Aphids)
- Subfamily
- Calaphidinae
- Tribe
- Panaphidini
- Genus
- Panaphis
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Habitat
May occur on European Walnut (Juglans regia) where it is present.
Seasonal Activity
When Walnut is in leaf.
Diet and Behavior
Life History
Panaphis juglandis live on the upper sides of leaves of European Walnut in rows along the veins, and are sometimes ant-attended.
Additional species information
Recorded status
Status in Britain is hard to determine due to lack of records.
About True Bugs, Cicadas, Hoppers, Aphids and Allies: the wider group
Order-level background for Hemiptera, the group containing Panaphis juglandis. Species-specific details appear above.
Group overview
Hemiptera (true bugs) includes over 80,000 described species across cicadas, aphids, leafhoppers, shield bugs, and bed bugs. Aphids alone cost global agriculture an estimated $2.5 billion annually in crop losses.
Ecological role of the group
Many Hemiptera are essential food sources for birds and predatory insects. Cicadas provide massive nutrient pulses during emergence events - a single Brood X emergence can involve trillions of individuals across 15 states.
Economic and practical significance of the group
The brown marmorated stink bug (Halyomorpha halys) caused $37 million in apple crop losses in a single year in the U.S. Mid-Atlantic region. Bed bug infestations in the U.S. increased by 500% between 2001-2010, costing the hotel industry hundreds of millions annually.
Recorded sources for this group: USDA, EPA, University research. Imported estimates may describe particular regions or reporting periods.
Photos of Large Walnut Aphid (7)
Frequently Asked Questions About Large Walnut Aphid
What is Large Walnut Aphid?
Large Walnut Aphid (Panaphis juglandis) is a species in the family Aphididae, within the order Hemiptera.
Where is Large Walnut Aphid found?
Habitat: May occur on European Walnut (Juglans regia) where it is present.
When is Large Walnut Aphid active?
Large Walnut Aphid: seasonal activity - When Walnut is in leaf..
What is the life cycle of a Large Walnut Aphid?
Panaphis juglandis live on the upper sides of leaves of European Walnut in rows along the veins, and are sometimes ant-attended.