White oak leaves brown - Ask Extension
Hello
I attach photos of my white oak with brown leaves and also with spots. On lower branches of tree. Wondering if I need to do anything ?
Than...
Knowledgebase
White oak leaves brown #874393
Asked June 24, 2024, 10:18 AM EDT
Hello
I attach photos of my white oak with brown leaves and also with spots. On lower branches of tree. Wondering if I need to do anything ?
Thanks
Genesee County Michigan
Expert Response
Hello
Your leaves have a few types of gall on them, most look like saucer galls. After our mild winter and this warm, wet spring, we are seeing high numbers of a variety of insects. So, it isn’t surprising to see this, since galls are made by tiny insects.
https://bygl.osu.edu/index.php/node/2185
While unsightly, they do no permanent harm to the trees. Gall forming insect populations often cycle from high to low, and next year you may see very few.
If we enter a droughty period this summer or fall (more than 2 weeks without substantial rain) keep the trees most affected by brown or dropped leaves well watered, without drowning the tree.
Your leaves have a few types of gall on them, most look like saucer galls. After our mild winter and this warm, wet spring, we are seeing high numbers of a variety of insects. So, it isn’t surprising to see this, since galls are made by tiny insects.
https://bygl.osu.edu/index.php/node/2185
While unsightly, they do no permanent harm to the trees. Gall forming insect populations often cycle from high to low, and next year you may see very few.
If we enter a droughty period this summer or fall (more than 2 weeks without substantial rain) keep the trees most affected by brown or dropped leaves well watered, without drowning the tree.
Thanks very much
Very helpful
Sent from my iPhone
Sent from my iPhone
On Jun 24, 2024, at 10:44 AM, Ask Extension <<personal data hidden>> wrote:
