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Aphids are soft-bodied insects that feed on plant juices using piercing-sucking mouthparts. There are many species of aphids and they may be white, yellow, green or black. They may be specific to a single plant or feed on many.

Plants Affected
Woolly Elm Aphid
 Twisted, yellow leaves on elm trees are often caused by
the woolly elm aphid

  •  Herbaceous plants, rose, maple, mayday, spruce, elm, and poplar are common host plants.
  • Almost any plant may be affected, including grasses.


The first sign of aphids is the presence of sticky spots (honeydew) on leaves, or a black appearance (sooty mold) on  the bark.  Heavy feeding causes leaf deformation and curling, followed by leaf death.


Cultural or Non-chemical Controls:
Can be controlled by knocking them off affected plants with a forceful stream of water when first noticed.

Chemical Controls:
Heavy infestations may require an application of insecticidal soap.


Spruce Aphids  Aphids  Aphids

There are many species of aphids and they reproduce continually throughout the growing season,
causing a variety of shapes, colours and sizes to exist in the Grande Prairie area
and sometimes even on the same plant!

Last updated: 8/22/2016 3:06:20 PM