Homeowners with ash trees on their property in five Nebraska counties are very concerned now that the emerald ash borer were found in trees in an Omaha park. John Fech is a University of Nebraska – Lincoln Extension Educator in Douglas and Sarpy Counties and says people should be able to figure it out on their own if their trees are healthy or need to come down.
Fech says, “A stressed ash tree is one that will be thin in the crown and has some basil shoots that are sprouting out and holes in the trunk in kind of a capital “B” shape. Those are the ones that are already infested.”
Fech says if it is a smaller tree, 15 to 20 inches in diameter, it is a good candidate for treatment. However, you can only treat them for a certain amount of time. He says some you can do by yourself but others you will have to call in a certified arborist for assistance. He says that can get costly. He says those with older trees or young trees planted in the last couple of years may want to consider taking them down and planting another variety.
Back in the late 1960’s and early 70’s, Dutch elm disease wiped out a good portion of the elm trees in North America. Fech says this could be very similar and have the same magnitude of impact.