Another year, another new aphid in town. On the weekend I found a cluster of black aphids feeding on the flower buds of a Japanese aralia in Christchurch, NZ.
They match the description of ivy aphids, a Eurasian native aphid that specialises on ivy and related plants in the Araliaceae family.
The species was first spotted in Auckland in 2015 (on #iNaturalist), and mine is the second record of the species from NZ's South Island. The first was an observation by Libby Stevens in Christchurch in October.
It's worth keeping an eye out for. It would be great if it helped knock back the competitiveness of English ivy, which is a weed here. More worryingly, it's also known overseas to feed on *Schefflera* species, and NZ's endemic patē, seven finger, is *Schefflera digitata*. NZ's whaupaku, five-finger, and horoeka, lancewood, are also in the Araliaceae, so please keep an eye out for any black aphids feeding on these.
https://www.inaturalist.nz/observations/364965581
#insects #biosecurity #aphids #nz #iNaturalistNZ #entomolgy