Pin oak leaf drop

Question: My patio was covered with leaves which had brown growth attached near the stem . Wondering what is happening.?

responder: Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied July 25, 2023, 2:25 PM EDT
response: Hi,  This looks like a leaf gall. Many trees get different galls and most of the time they are not of concern. On oaks they are typically wasps that make these. It is difficult to say for sure which gall this is because it is dried up. https://extension.psu.edu/galls-on-oak You do not need to use a pesticide to deter the wasps  as most of the galls do not harm the tree. If the overall health of the tree seems to be fine, even though it is dropping some of the damaged leaves, the tree should push out new growth.  If you are concerned for the trees health, fee free to send back more photos of the overall tree or some of the branches.  Emily

responder: The Question Asker Replied July 26, 2023, 9:36 AM EDT
response: Hi Emily, thank you so much for the information. My tree is older and looks healthy it has some dieback branches which seems to be very common. I was worried because some of the oak trees( a different verity ) in the neighborhood are dying . Some of our black locust trees and red maples are dying. It’s very distressing. Thank you , BrigittaOn Tue, Jul 25, 2023 at 2:25 PM Ask Extension <<personal data hidden>> wrote:

responder: Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied July 26, 2023, 2:00 PM EDT
response: Hi Brigitta,  It can be distressing to see trees seemingly die all at once. Black locust trees look a little rough this time of year and with the lack of water Red Maple are probably struggling too.  Many Oak trees are aging out of our communities in urban and suburban settings due to common environmental stressors and weather patterns that are seemingly due to a changing climate. You can read this article for more information: Why are Oak Trees Declining or Dying.  Let us know if you have further questions.  Emily

responder: The Question Asker Replied July 29, 2023, 10:21 AM EDT
response: Hi Emily, thank you for your explanation. I would like some help identifying some volunteers in my garden. Attached are some photos of the trees in question. I very much appreciate your help.On Wed, Jul 26, 2023 at 2:00 PM Ask Extension <<personal data hidden>> wrote:

responder: Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied July 31, 2023, 12:10 PM EDT
response: Hi,  The first photo is a white mulberry. They can be weedy trees. The second photo we are leaning towards either an Elm or type of Cherry tree. It is difficult to see the leaf connections, and buds. You can see if it produces some seeds this year and maybe that can help ID. You can also explore this dendrology key from VTech. https://dendro.cnre.vt.edu/dendrology/leafkey1.cfm?state=&zone=6&habit=tree&leaftype=broadleaf&Phyllotaxy=alternate&leafhardwood1=simple&leafhardwood2=&leafshape=ovate1&leaflobes=unlobed&leafedges=serrate&thickness=thin  The 3rd photo we are unsure but it appears to maybe be a type of perennial. It is difficult to identify plants with out key characteristics like blooms or buds etc.  If you end up seeing flowers, feel free to respond with a photo of one.  Emily

responder: The Question Asker Replied August 03, 2023, 9:43 AM EDT
response: Thank you for the information, BrigittaOn Mon, Jul 31, 2023 at 12:10 PM Ask Extension <<personal data hidden>> wrote:

responder: The Question Asker Replied August 03, 2023, 9:43 AM EDT
response: Thank you for the information, BrigittaOn Mon, Jul 31, 2023 at 12:10 PM Ask Extension <<personal data hidden>> wrote:

responder: Answered by the Home and Garden Information Center (HGIC), University of Maryland Extension. For timely gardening information and tips, subscribe to our Maryland Grows blog and quarterly newsletter. Follow us on Facebook, Instagram, and YouTube. Replied August 03, 2023, 11:43 AM EDT
response: You're welcome