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Page Hometown » Iowa
Posted: 8/13/2007 4:31:49 PM EDT
my wife found this stuff growing on the apple tree. i have other apples, cherries, and peaches it ISN'T growing on.

it has a cotton-like feel. when you pull it off there is a sticky red/black stuff underneath the size of mulberry seeds. weird...

anybody know anything about it? if so, is there a remedy?

earl may doesn't seem to know much about it. we've recently battled aphids and spider mites, but this one has me stumped.

help please.


Link Posted: 8/13/2007 6:46:26 PM EDT
[Last Edit: 8/13/2007 6:47:21 PM EDT by ArmedFerret]
Looks like woolly apple aphids:

The woolly apple aphid differs from other apple aphids in appearance, life cycle, and the type of damage inflicted. A colony appears as a cottony mass generally clustered in wounds and pruning scars on the trunk and branches of the tree. The aphids themselves are purplish in color surrounded by white, cottony, thread-like secretions. Woolly apple aphid is a sucking insect pest that weakens the tree by feeding on limbs and roots. It gets its name from the woolly appearance of its colonies. Long strands of white wax are produced that help to protect the colony of purple aphids from predators and pesticide sprays.

Woolly apple aphid is a serious pest of apples, particularly young trees. Colonies form at wound sites on trunks, limbs, and twigs, where they feed on tender bark. Pruning and hail damage can create the wound sites for attack by this pest. Egg-laying wounds by the periodical cicada are ideal sites for infestation. As populations grow, aphids are commonly found on water sprouts in the center of the tree. The tree will begin to swell and form galls at the feeding sites.

As the number of aphids on the above ground portion of the tree increase, many work their way down to the roots and trunk below ground surface. It is the feeding on the roots that produces the greatest damage. Mature trees usually suffer little damage from the root infestations, but the root infestations are very damaging to young trees. Control of these aphids is very difficult when they attack the roots. Yellowish foliage is a sign that woolly apple aphid may be infesting roots. The root systems of nursery stock can be damaged, and severe root infestations can stunt or kill young trees. Infested trees often have short fibrous roots, which predisposes them to being easily uprooted. Swollen galls also form on roots; galls increase in size from year to year and are sites where fungi can attack. Aphid feeding on the root systems also disrupts the nutrient balance of root tissue, which can affect growth of other parts of the tree. Trees can have above-ground infestations of woolly apple aphid but no root infestations. Rootstocks vary in susceptibility to woolly apple aphid and susceptible rootstocks will form galls around the infestation sites. Use M111 or M106 if woolly apple aphid is a serious problem. Rootstocks appearing more susceptible to woolly apple aphid infestation include B9, M9, M26 and the P series.

During the summer, repeated woolly apple aphids generations of wingless individuals are produced. In the fall, winged individuals are produced which fly to search for elms on which to lay overwintering eggs, while some wingless forms may remain on both above and below ground parts of the apple tree throughout the winter.

Woolly apple aphid colonies produce honeydew, which results in development of black sooty mold. The wax and the honeydew are bothersome to pickers when it brushes off the tree and onto clothing of pickers.

As for control:


There are few insecticides specifically labeled for control of woolly apple aphid. Diazinon, Thiodan and dimethoate are recommended for control of above-ground infestations. There are no insecticides to control root infestations on bearing apple trees.
Link Posted: 8/14/2007 2:54:58 AM EDT
Septic -
You are having a helluv a time with weird chit living on your property .

Link Posted: 8/14/2007 4:19:07 AM EDT
wow... they claimed this year would be the worst "bug" year we've seen in decades due to last fall and this spring in relationship to moisture and temperature. they weren't kidding. i've had all kinds of things i've never even heard of...

fuckin' global warming...
Link Posted: 8/14/2007 4:22:55 AM EDT

Originally Posted By ArmedFerret:
Looks like woolly apple aphids:

thanks man! more stuff i don't want...

looks like it is a trip for diazinon today...
Link Posted: 8/14/2007 5:43:43 AM EDT
I will send this to my Dad. He is in the landscaping business. Most likely he has seen this stuff. I will report back when I hear from him.
Link Posted: 8/14/2007 1:10:47 PM EDT
thanks fellas! i got the goods and have applied it. diazinon is no longer sold to the public, but i remembered a neighbor of mine had some, so i'm golden...

Link Posted: 8/14/2007 6:46:37 PM EDT
nicely done.
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