Citrus Trees
Q.

Can citrus trees get fireblight?

Zone 98245 | roxy marck added on January 19, 2019 | Answered

I have a disease rapidly moving through my mandarin/rangpur lime trees. Trees are in pots. Problem began about 2 months after I moved them indoors (I live in north Washington state). Leaves wilt and turn grayish brown. They do not get brittle until a few days after they turn completely brown. Problem started with outer leaves and progresses toward the trunk. Some branches have green leaves. I have photos. Trees were repotted into larger containers about seven months ago. I let them dry thoroughly before watering. Fertilizing seems to have accelerated the spread of the disease. Trees are under grow lights with about 12 hours of light per day. Photos of fireblight seem to most closely resemble the problem.

    A.
    A.Answers to this queston: Add Answer
    drtreelove
    Certified GKH Gardening Expert
    Answered on January 20, 2019

    No citrus don't get fire-blight. There are other plant diseases possible, but from the photos and your description, I suspect it is a water related disorder and not a plant disease.

    "I let them dry thoroughly before watering." You may be letting them get too dry between waterings. How do you measure this?

    I use multiple methods of assessment for when to water, physical and intuitive: finger probe of soil surface to maybe 1 inch. Soil moisture meter to 10". Visual appearance of foliage for possible wilting, and when wilting gets extreme there is a color change to a lighter green and then possible bluish-green color, which is usually past the point of no return. I also try to "tune in" to the plant needs, if you will, and let it tell me when it needs water.

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

    http://ipm.ucanr.edu/PMG/C107/m107bpleaftwigdis.html

    00
    Was this answer useful?

    Log in or sign up to help answer this question.
    Did you find this helpful? Share it with your friends!

    You must be logged into your account to answer a question.

    If you don't have an account sign up for an account now.

    Looking for more?
    here are more questions about...
    Citrus Trees
    Join Us - Sign up to get all the latest gardening tips!

    Do you know a lot about gardening?
    Become a GKH Gardening Expert

    Learn More