Cottony Ash Psyllid
Psyllopsis discrepans
This record describes Psyllopsis discrepans (species). Recorded family: Liviidae. Recorded order: Hemiptera.
Identification and Appearance
Length 3-4mm. Very similar to P. fraxini but with less intense wing markings. It causes marginal leaf-fold galls on ash leaves, which are pale with reddish/violet marking; the galls cannot be distinguished from others in the Psyllopsis fraxini species aggregate. The nymphs inside the galls are pale green with black markings and white wax. Unless identified by a recognised expert, a photo is required showing the diagnostic features. Rarely recorded but probably widespread. No additional images available for this species.
Classification
Habitat and Range
Habitat
Feeds on Ash.
Seasonal Activity
June to October.
Additional species information
Recorded status
Rarely recorded but probably widespread.
About True Bugs, Cicadas, Hoppers, Aphids and Allies: the wider group
Order-level background for Hemiptera, the group containing Psyllopsis discrepans. 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 Cottony Ash Psyllid (3)
Frequently Asked Questions About Cottony Ash Psyllid
What is Cottony Ash Psyllid?
Cottony Ash Psyllid (Psyllopsis discrepans) is a species in the family Liviidae, within the order Hemiptera.
How big is Cottony Ash Psyllid?
3-4mm. Very similar to
Where is Cottony Ash Psyllid found?
Habitat: Feeds on Ash.
When is Cottony Ash Psyllid active?
Cottony Ash Psyllid: seasonal activity - June to October..