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Benton, Ark. – Hackberry trees have been great shade trees for years, until the last
20 years or so , when an invasive pest from China, the Asian Wolly Hackberry Aphid,
was accidentally brought into the U.S.
We have many different species of aphid, but this one stands out, and it only attacks
Hackberry or Sugarberry trees. It seems to be more aggravating than the other aphids.
I guess because Hackberry trees can get quite large and over shadow our homes and
outside areas we frequent.
These aphids produce large amounts of honeydew, the sticky substance that covers the
leaves and also falls onto your car and patio and toys and anything else it can mess
The aphids do not actually hurt the trees, although after being covered by them, the
honeydew will have a black sooty mold grow on the leaves and ruin the looks of the
Aphid populations are hard to predict each year, but the last two summers they have
been abundant. There are predatory insects that feed on the aphids, but there are
never enough predators when you need them. The recommendation for control is to drench
around the tree with a systemic insecticide. This is not a reliable treatment due
to getting enough insecticide into a large tree and at the time when the aphids are
present is difficult.
The Asian Wooly Hackberry Aphid is easy to distinguish because its name gives it away.
When flying they look like pieces of cotton in the air. Another of nature’s phenomenon,
but what a mess it causes.
Media Contact: Saline County Agent Ron Matlock, County Extension Agent - Staff Chair U of A Division of Agriculture Cooperative Extension Service 1605 Edison Ave., #15, Benton, AR 72015 501-303-5672 firstname.lastname@example.org
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