Grapefruit Trees
Q.

Grapefruit tree bleeding. Why?

Zone 92234 | [email protected] added on November 5, 2018 | Answered

Mature tree. Good fruit and leaves. Small splits on trunk area are oozing pitch. It’s dry, not sticky. May be from summer or spring. Does this likely need treatment?

A.
A.Answers to this queston: Add Answer
drtreelove
Certified GKH Gardening Expert
Answered on November 7, 2018

The condition is possibly "Phytophthora gummosis" a fungus-like disease organism that causes the exuations. See the 'management' section in this UC article.
http://ipm.ucanr.edu/PMG/r107100411.html

There is one fungicide that I know of that is labeled for phytophthora disease, Subdue Maxx or the generic equivalent:
https://www.domyown.com/mefenoxam-aq-fungicide-p-16650.html

It only takes a quarter ounce per gallon of water for a soil drench solution. But the minimum purchase is a quart, so it's kind of expensive.

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...
Grapefruit 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