The Tropical Fruit Forum

Temperate Fruit & Orchards => Temperate Fruit Discussion => Topic started by: Lovetoplant on March 23, 2021, 03:36:59 PM

Title: ShotHoles diseases on leaves of plum Trees
Post by: Lovetoplant on March 23, 2021, 03:36:59 PM

Hello,  the leaves on my plum trees have bacterial disease call shothole disease.  Does anyone know how to rid of it?  I have been spraying the trees with Liquid Cop(liquid copper) since December last year once every 10 days or so up until now.  All new leaves are starting to show this symptom again.

(https://i.postimg.cc/H8GPR69V/image.jpg) (https://postimg.cc/H8GPR69V)

(https://i.postimg.cc/HJq2kVcN/IMG-5677.jpg) (https://postimg.cc/HJq2kVcN)

Title: Re: ShotHoles diseases on leaves of plum Trees
Post by: Daintree on March 24, 2021, 12:23:27 AM

Copper sprays can actually damage the leaves, and usually trees are just treated in the fall, after leaf drop. You can treat again in the spring, but every ten days for three or four months seems excessive. Spraying dormant twigs and buds should have prevented carryover to new growth, so I am wondering if you are just overapplying. expect it to take a couple years to get it under control.

Carolyn