white fuzzy insect stuff on my apple trees

oldryderSeptember 29, 2012

watering my trees I noticed several small (maybe 1" long) bright white deposits on the branches of a few of my trees.

if I rip the deposit off between thumb and finger there are little black specs and what looks like blood (not mine) on my finger.

since I just managed to get ahead of the tent caterpillars this year I want to deal with this aggressively assuming it's some kind of undesirble bug.


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fruitnut Z7 4500ft SW TX

Woolly apple aphids. I tend to ignore them even though over time they can take out a tree. They are most damaging on the roots so a resistant rootstock is good. If my memory is correct I have them now on roots of potted M7 and Geneva 30 but not on Geneva 11 and MM106. MM111 is supposed to be resistant.

Here is a link that might be useful: woolly apple aphid

    Bookmark   September 29, 2012 at 9:57AM
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We have seen a few tiny groups of them here for the first time ever this year as well. One little blob on a new graft in mid-summer, and just yesterday a tiny little speck down at the roots of a different tree. I was out insepcting for round headed apple borers at soil line or I never would have seen them. Squashed them all.

Hoping it has something to do with the wacky weather year we have had and not indicative of another ongoing problem developing.

    Bookmark   September 29, 2012 at 12:02PM
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I just visited an orchard of a commercial pest control consultant who advises central valley orchardists; he has access to all kinds of controls, but said blasting them with a hose has given as good of control as anything else he's tried. Resistant rootstocks such as M111, M106, and Northern Spy should be your norm from now on as if they're in the tree, they're in the soil where you can't get to them.

    Bookmark   September 29, 2012 at 1:24PM
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I had a Cox's Orange killed by them, relying on the advice out there that "they are no big deal." It took a couple of years, but they damaged all the tree's bark so much it just finally croaked. Blasting water works a little, but there is white fuzz back within a week, AND you have to hold the branch to effectively blast them off, so once a tree gets so big, that's pretty much a useless task. I now have them again on the one tree I didn't buy on M111, so I assume it will eventually die too, because they are impossible to effectively control. All my M111 trees are barely affected, so that is the only solution, IMO.

Carla in Sac

    Bookmark   September 29, 2012 at 3:35PM
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i have them on my apple tree as well and have been blasting them with high pressure water but they are over. what are they and what will kill them?? no apples this year so i will spray in the morning i guess. j

    Bookmark   June 21, 2014 at 6:10PM
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A quart spray bottle of water and a little bit of dawn works well for me. I only have a few trees so when I do my daily walk through, they get a taste of soapy water. Good luck, Bill

    Bookmark   June 22, 2014 at 6:26AM
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