Does someone know what this is I have on my apple tree?
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Looks like Wooly Apple Aphids
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What can I do to treat them?
Smoosh’em
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neem oil will suffocate them.
Good article
I squish when i see them. They crawl up from the roots - some neem low on the trunk should stop them from getting to leaves
http://treefruit.wsu.edu/crop-protection/opm/woolly-apple-aphid/
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Go after where they are breeding
Beneficial nematodes HB/SC/SF