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Frequently Asked Questions

Topic: Insects and Pests

1. Question: My magnolia tree has scale. What can be done?
Answer: Magnolia scale is a common pest on magnolia trees and we have noticed an increase in population this year.

Magnolia scale generally requires two spray applications with an insecticide labeled for scale between mid-August and late September to suppress scale crawlers. Applications may be needed again next year if there is a heavy population on your magnolia.
 
2. Question: I have three Birch trees in my yard. They are starting to show signs of a beetle infestation. The top branches had leaves turning brown and dying just prior to the fall leaf drop. The trees are over 20 years old and I'd like to know if they can be saved.
Answer: We would like to arrange a time for our arborist to meet with you to evaluate your Birch trees. We do have a treatment to suppress the borers causing the damage to your trees. You can make an appointment by clicking here.
 
3. Question: We have an Aspen tree that gets some kind of bugs on the leaves. The leaves get really sticky and, by summer, there are wasps and bees swarming around it all the time. It is right next to our neighbors house and along our driveway. The driveway gets this weird stuff all over it and the grounds actually looks darker under the tree from the substance. We've had the tree sprayed in the past, but it doesn't seem to work. What do you suggest?
Answer: There is a systemic insecticide that can be applied to the soil at the base of the tree that will be absorbed by the roots and transferred into the foliage. The treatment will provide season long control of aphids, as it is highly effective. This is a process that should be handled with great care. You can click here to make an appointment with one of our professionals.
 
4. Question: Can the Emerald Ash Beetle be controlled in the healthy looking trees?
Answer: With the Emerald Ash Beetle, you would see exit holes and the tree would not survive the damage from the beetle. We recommend having the tree examined by a certified arborist to make sure it is not the Emerald Ash Beetle. If it looks like this particular insect, then the state should be informed. You can click here to schedule an appointment with one of our professionals.
 
5. Question: I have insects in one of my trees. Recently, a large branch fell, exposing the extent of the insect damage. Could you provide insight as to what I may be able to do to prevent further damage?
Answer: Insects can invade trees several ways. With what you described, it sounds like ants in dead heartwood of the tree. The condition mentioned should be evaluated by one of our Certified Arborists. You can make an appointment by clicking here.
 
6. Question: My Princeton Elm leaves are being eaten by a small green caterpillar a half- to one-inch in length. The damage has been fairly extensive for the last two years and this year it has started very early. The tree is 15 years old and about 50 feet tall.
Answer: It sounds like Winter Moth, an insect that has migrated into our area from Asia through Canada. It feeds on many deciduous trees in early spring, but prefers fruit bearing trees such as ornamental cherries, pears, and crab-apples. If the tree is attacked repeatedly, it could weaken it and kill it. Two treatments are necessary and will likely need to be done on a yearly basis until this pest subsides.
 

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