Insect and Disease Issues

Emerald Ash Borer

The Emerald Ash Borer Emerald Ash Borer Size Emerald Ash Borer Hole Emerald Ash Borer Trails

The Emerald Ash Borer has officially entered Dodge County!

According to Wisconsin's Emerald Ash Borer Information Source, the borer was found on August 1, 2013 at the Riverside Park in Watertown, WI. Dodge county has since been quarantined--which means absolutely no movement of all hardwood species of firewood, nursery stock, green lumber, and other material living, dead, cut or fallen, including logs, stumps, roots, branches and composted and uncomposted chips from the county.

What you need to know about the emerald ash borer:

  • Only ash trees are affected by the emerald ash borer.

  • The larvae of the emerald ash borer kills the tree, adults do not.

  • Treatments are available to prevent the borer from killing your ash tree.

  • Trees infected with emerald ash borer are still worth treating if more than half the crown is still alive, and appears to be healthy with few signs of borer infestation.

Progression of Emerald Ash Borer Infestation in an Ash Tree:

Stages of Emerald Ash Borer Infestation. Healthy Ash Tree, Before Infestation Leaf die back with start of borer infestation. Failing tree infested with ash borer, shoots will start sprouting out of the trunk.

  • Treatment should be carried out on an annual or biannual basis, depending on the treatment used.

  • Treatment of valued ash trees should begin when the emerald ash borer has been discovered within 15 miles.

  • DO NOT move/transport firewood to prevent quicker spread of the ash borer.

  • The emerald ash borer is not a disease, it is a bug.

Call us about our treatment options to prevent emerald ash borer, as well as other insects, from ruining your trees!

For more information on the emerald ash borer, visit

Treatment for Apple Scab

Before and after pictures on the effect of apple scab on a flowering crab tree. Before and after pictures on the effect of apple scab on a flowering crab tree. Brown patchy areas will start to appear on the leaves. Patchy areas will most likely occur on the top of the leaf. Fruits will grow brown patchy areas as well.
Apple scab is a serious fungal disease of ornamental and fruit trees in the rose family. Most commonly effected trees are crabapple, hawthorn, mountain ash, apple, and pear. Scab lesions (brown, patchy areas) are often first noticed on leaves, where they commonly occur on the top of the leaf. Fruits are especially susceptible to infection.

The time to prevent apple scab is in the early season, before the tree blooms. Once your tree has blossoms, treatments are less effective. Our treatments for apple scab vary from 2 - 4 sprays (most commonly 3 sprays are recommended). A spray is done before the tree blooms, during the blooming season, and after.

Call today to begin treatments on your ornamental or fruit trees before the blooming season starts!

Japanese Beetles

The Japanese Beetle Leaf affected by the Japanese Beetle
There is one negative to the summer time--Japanese Beetles! The small, brown/copper iridescent bug that destroys flowers and trees alike once they emerge around mid-June. They are known to feed on over 300 species of plants! Once a Japanese Beetle lands on a flower or tree and tends to like the taste of it, it will send a chemical into the air that will alert every hungry Japanese Beetle in the area to come and feast!

Here at K&B, we offer two measures to stop the Japanese Beetles from feeding on your plants. As a preventative measure, we offer a systemic treatment that is applied annually to your affected tree. This offers a long residual, and if a Japanese Beetle started to feed on the leaves--it would die.

We also offer an insecticide spray to be applied once Japanese Beetles are present on the trees, bushes, flowers, etc. Once dry, this offers a residual of around 6 weeks, and whenever a beetle would come in contact with it--it would die.

Call K&B for Home and Yard Pest Control!