Ask a Question
Notify Me On Question Update
Email this Question
A landscaping company planted 6 jaquemonti birch in my yard at the end of May. Two of them recently began developing darkish brown leaf spots in the center. They are getting plenty of water. On one of the leaves I found very tiny black insects. I did not find insects on any of the other leaves. What could the problem be and what should I do about it. I picked the infected leaves off that I could reach. I also collected the insects.
Rate This FAQ
From your description there may be two different things happening. The first possibility is that this particular type of tree is not heat tolerant and the leaves may be scorched because of our hot and dry weather conditions. This problem usually shows up in July and August with newly transplanted trees being the most susceptible because they have yet to develop extensive root systems. I have included a link below that has more information on leaf scorch.
The second possibility is that what you are seeing is a fungal disease. Fungal diseases usually start out as dark brown to black spots. These spots will spread and eventually grow together and in severe cases the leaves may die and fall off. When we have long periods of cool wet weather, like we did this spring, fungal diseases can be more problematic. If it is a fungal disease the good news is that now that we are having much hotter and dryer weather you should see a significant decrease in the spread of this problem. Below is a link with more information on a common fungal disease in our area. If it is fungal, some things you can do to help your tree out are to make sure to pick up and discard any of the leaves that fall off of this tree. This will help reduce the spread of the fungus. When watering the tree try to avoid getting water on the leaves. If the tree is watered by sprinklers make sure to run them early enough in the day so the leaves will be dry before nightfall. Below is a link with more information on watering trees. You can also apply a protective fungicide spray at bud break and to the newly emerging foliage next spring.
If neither of these look like what you are seeing on your trees please bring a sample into our office at 2001 S. State Street #S1200 for help with diagnosis.
Submit Your Suggestion
Other Questions In This Topic
- My husband mistakenly put fertilizer with a broad leaf killer in it on our garden. Is there anything we can do to grow things this year? Everything has died sadly.
- I just recently moved into a home that has these terrible "soda straw" type weeds that I can't get rid of. They pop apart and look like tall drinking straws. I have sprayed them with multiple rounds of poison (extra strength!) and dug them out by hand 2 or three times. They are coming back stronger than ever. What should I do?
- Our blue spruce has been around for 30 years. but the new buds have no needles and they are brown. Even up the center of the tree is brown with no needles. My father has put a bed of rocks around it and I am not sure if it is affecting it. We also had two crimson maples and they lost all of their leaves half way through summer. This year there are no leaves at all. Do the trees have disease?
- I want to limit growth of newly planted fruit trees and wonder if it would be possible to do that by making a large wooden box and planting each one in a box in the ground? Also if it would work to do that, do I need redwood? I have a stack of 4 x 12 x 16 douglas fir lumber which had been painted on one side and I wondered if I could use them to do this or will they create bug problems?
- I put in my entire yard in Fruit Heights in late July. I noticed my maple trees are losing leaves, and showing signs of distress. I put sod up to the tree trunks, but I'm wondering if I should cut the sod back, and put mulch in so the tree roots can breath. Good idea? I cut back on the watering as well, which could have been a problem for drainage. Any help?
- We have 2 honeylocust trees in our yard. I would guess "Imperial honeylocust". They seem to be about 15 years old or so. They are spaced about 20 feet apart. This spring one has leafed out and the other is still not budding or leafing out. Over the winter, the one that is not budding turned bright red on the trunk, which we have never seen before. The tree is getting a very few buds and leaves on some main branches (like suckers) but no buds or leaves on the outer limbs. Is there anything we can do to save this tree?
- Flowering Pear trees. I have some mature "Chanticleer" flowering pears. For the last 2 years, the new foliage has emerged with curled leaves and a white, cottony substance. This condition seems to lessen with the hot weather, but the foliage doesn't seem to totally look healthy like when the trees were younger. What is it and can it be treated?
- We currently have an elm tree in our front yard. It has been diagnosed with slime flux. We would like to plant another tree next to it,seeing as they said the stump was so big that they would just leave it. Will this cause a problem for any other trees? We want another large shade tree. Will it get the slime flux too if we plant it near it?