Spider Mites ??

Asked September 11, 2018, 10:34 AM EDT

I am trying to treat a pine tree in my yard up North, which I believe is infested with Spider Mites. I think the tree might be a Hemlock, and its too tall to use a spray (over 40ft) and the bugs are up at the top too. So I think I need a Systemic type product. Can you suggest an insecticide/product to use so I can save the tree ?

Cass County Minnesota

1 Response

Spider mites are killed by miticides. Insecticides won’t work and are mildly toxic to the tree so they make it worse by stressing the tree further. Mulching under the tree and watering it regularly can help it survive the mites. https://ento.psu.edu/extension/factsheets/spruce-spider-mite https://extension.umd.edu/hgic/spider-mites-trees-and-shrubs Using https://pubag.nal.usda.gov/download/23579/PDF Using the systemic imidacloprid seems to make the infection worse. A search for an effective systemic has not found one tree care seems to be the treatment available to home owners. https://entomology.ca.uky.edu/ef438