corkskrew willow tree

QuestionI have a corkscrew willow that is dying...it seems to be covered in tiny black aphids? the bark on the trunk is peeling back and is black like? I sprayed it off with water to get the bugs off and they were b

emarald green arbovitae

QuestionI planted my emerald green arbovitae last fall and this summer i notice that the inner part of the tree is brown. what can i do to resolve it. Thanks AnswerId be concerned that you are giving them too much

crepe Myrtle insects

QuestionWe have bugs that are drilling little holes right where the blooms should sprout from the base- and the tree hasnt bloomed yet! WHat types of bugs could these be, and how can we get rid of them?? Thanks!~ A

Nutall Oak problem

QuestionDear Jim...I planted 50 Nutall Oaks on my place two years ago. I have done my best to keep them watered and properly fertilized....they were about 10 ft tall when I planted them. I lost about 16 of them th

ornamental plum tree black knot disease

QuestionIs there anything I can do during this season to start the cure of black knot disease on my plum tree AnswerHi Jane, Just read up on your black knot disease. It is a fungal disease that seems to be pr

dogwood

Questioni have a 3 foot dogwood that the leaves are turning black and falling off and bark coming loose at the bottom above the ground what might be happening or causing this? What can I do? It is a red dogwoo

birch tree deease

QuestionMy birch tree has a white powdering on some of the leaves. How can I identify what it is and what can I do about it ? AnswerJoseph: Thanks for your inquiry. If the white powdery substance looks

Wisteria collapse

QuestionDear Stephen, Some three years ago we planted two plants of wisteria sinensis, in the very south of Sweden. They have done well, and even bloomed. Four days ago they were both still in good shape, but one

Green Layer on my Maple Trees

QuestionI have two Maples in my front yard. One is a Red and the other Green. They recently were trimmed back to allow sunlight to reach my porch and flower bed. Now the heavily exposed areas of bark, from the groun

Crype Myrtle disease

QuestionI have a black powder all over my crype myrtle. It also has things that look like aphids all over back of leaves and a few womrs that are black and yellow. The leaves are turning yellow and all f

Cucumber Problems

Question Cucumber Disease Dr. Vann, We have been having white/brown spots on our cucumber plant leaves for the last two years. They eventually spread to other leaves, stunt the vines and fruit. We have t

Elm tree bark peeling

QuestionI have a young Elm tree that was planted approximately 3 months ago. The bark has begun peeling on the entire trunk. And sap is now leaking from a couple of the branches where they connect to the

stewartia pseudocamellia

QuestionHello. I have a ten foot stewartia I planted this passed spring. It receives all morning sun and couple hours of early afternoon sun. What Ive read tells me the tree should not get too much hot afternoon sun

Sargent Crab Apple and Washington Hawthorne Trees

QuestionQUESTION: I live in Bucks Co. Pa. In early spring I sprayed my Sargent Crab Apple for fire blight and it bloomed profusely for the 1st time in 5 yrs.Prior to spraying, I cut out infected branches as best I c

Yellow leaves and shriveled peaches

QuestionI have two peach trees that the leaves are turning yellow, and the peaches have just dried up into almost looking like prunes AnswerHi Troy, from what I am reading sounds like your tree has Peach leaf curl

boxwood leafminer problem

QuestionQUESTION: Hi Dr. Vann, I hope you can help save my boxwoods from leafminers :-) Some of the leaves on my boxwoods have turned a tan colour. I did some research on the internet and discovered the problem is

aphids

QuestionHi Dr. Vann, I think I have a serious case of aphid infestation. I havent noticed any plants dying(yet) but my hostas, peonies and all other leaves in my garden bed are covered with clear sticky stuff. The

Crape Myrtle Disease

QuestionI have a very old crape myrtle which has a sticky residue over the entire plant with a few what looks like aphids on the leaves also. My entire car is covered in this residue 2 morning in a row now sin

Weeping Holly

QuestionI have a weeping holly that is 8 to 10 years old. Last year many of the leaves curled tightly closed and the branch eventually died. Closer examination found a leaf that seemed to be glued shut w

Magnolia tree leaf disease

QuestionMy small magnolia tree (6 ft) has what looks like warts or blisters on the leaves. They are hollow but I cannot find anything in them when I break it open. There are hundreds of them on the leaves. The leave