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  • Answered by
    BushDoctor on
    April 23, 2024
    Certified Expert
    A.

    It is hard to tell from the photo, alone. Ultimately, there are a number of causes. Fortunately, you can test for some of them. First, test the nutrient levels of the soil. If the tree isn't fed at least once per year, then it might be time to do so. If these levels are good, then you can move on to testing pH. Many times, these tests are available to test at the same time. As long as the soil is never allowed to dry out to drought levels, watering should not be necessary. However, a wet year could suffocate roots, or cause disease. If all test show good results, then it may be time to consult a local horticulturalist to test for chemical contamination. Unfortunately, you won't be able to tell if it is able to spread unless it is tested for or the other trees start showing symptoms.

    https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

    https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/test-soil-for-pests-and-diseases.htm

    https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

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