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Top Questions About Oak Trees

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Questions About Oak Trees

  • Answered by
    drtreelove on
    July 18, 2018
    A.

    There are several types of galls that form on oak trees. Crown gall on the tree trunk could be a concern. Some are leaf or twig galls formed by mini-wasps to harbor their larvae. They are normally not damaging to the tree. There are usually no known controls and no real need to control. I don't know the oak varieties and common galls on oaks in your area like I do in my home state of California. But you can get local information through your county and univesity extension service, or from a local arborist.

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  • Answered by
    Downtoearthdigs on
    July 22, 2018
    A.

    Brown leafs could be Leaf Scorch.

    https://www.gardeningknowhow.com/ornamental/trees/oak/xylella-oak-leaf-scorch.htm

    The needles on your Pine Tree may also have different causes.
    https://www.gardeningknowhow.com/ornamental/trees/pine/pine-tree-drying-bottom.htm

    I would suggest talking with your County Extension Office. They can help with regional issues with your trees.

    https://www.gardeningknowhow.com/extension-search

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  • Answered by
    drtreelove on
    August 3, 2018
    A.

    Triazide is a pyrethroid insecticide with the active ingredient of gamma-Cyhalothrin and should be very effective for immediate knock down of the caterpillars on contact. If you mixed the solution according to label directions and got good coverage of upper and under side of leaves, the oakworms should be down and out with one application.
    If you want to go organic next time, Bt is a biological control with no toxicity except for the target caterpillar pests. Timing is more critical than with the pyrethroid, early stage of development and feeding is best, the caterpillars have to ingest it to become affected. It usually takes a follow up spray to be completely effective. https://www.domyown.com/monterey-bt-insecticide-p-2821.html?sub_id=11262

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  • Answered by
    MichiganDot on
    August 10, 2018
    A.

    If your weather has been unusually hot or dry, this may lead to some acorn loss. The tree adjusts the number of acorns to match its energy reserves so that producing fruit/nuts doesn't exhaust the tree just before winter. Any change that stresses the plant will result in more immature drop than usual. Evidently, the red oak family which includes pin oak are rather famous for the number of acorns dropped early some years. Consider having the soil under the dripline tested to see if it is becoming depleted of nutrients. A soil test will give you corrective measures if deficiencies are uncovered.
    https://www.stltoday.com/lifestyles/drier-weather-may-cause-spate-of-immature-acorns/article_84d9ba71-ef69-53c8-9f5a-33d2448544cd.html

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  • Answered by
    oldspice on
    August 21, 2018
    A.

    That is normal. I have seen it on many healthy trees. It is like a wart on the tree. It does not effect its health.

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    10
  • Answered by
    BushDoctor on
    August 29, 2018
    Certified Expert
    A.

    It will be best to let them finish their entire first year in container, if possible. Bring them inside a garage or somewhere cool, but not frozen.

    The next season you can plant them out anytime that the weather is mild, and will be for several weeks so that the tree can establish before harsh weather.

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  • Answered by
    MichiganDot on
    August 29, 2018
    A.

    If you leave the tree in a container over winter, make sure it is large enough to accommodate growing tree roots. Roots continue to grow until the ground freezes - well past leaf drop. Roots that circle a container due to lack of space are a serious threat to the tree's health as it grows. Trees are subject to animal browsing especially in winter. Mice gnaw at the slender bark while rabbits and deer chew on branches. Make sure to enclose the tree in hardware cloth that is anchored to the ground. Don't prune it for several years as the seedling needs all its leaf surface to push new growth.
    Oaks are susceptible to oak wilt disease. To minimize risk, only prune in winter unless there are damaged limbs which should be pruned off right away.

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  • Answered by
    MichiganDot on
    September 1, 2018
    A.

    No legitimate arborist will top a tree. It is not healthy for the tree and the results are spectacularly awful. This is particularly true of pyramidal trees. (Use your search engine to check images.)
    https://www.treesaregood.org/portals/0/docs/treecare/WhyToppingHurts.pdf
    Have a professional arborist, not a landscaper, come over and talk to you about what can be done for your tree. Because oak wilt disease is a significant threat, major pruning should be done in winter.

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