Japanese Beetles started hatching a few weeks ago and will be around until September. They are extremely heavy in middle to South Naperville, Aurora, Batavia, Geneva and St. Charles at the moment.
They love a variety of trees and shrubs but their favorite is the Linden followed by White Birch, River Birch, Elm, Purple Plum and certain varieties of Maple and Crab. They also attack certain shrubs too numerous to list. If you see these trees displaying a ‘brownish hue’ toward the tops of the trees (as they like to feed in the sun) then you have Japanese Beetles.
You can also look for lacy leaves laying in the yard under the tree. The photo shows five beetles feeding on a Linden leaf creating that ‘lacy’ appearance.
We normally perform two spray applications to limit Japanese Beetle damage. Pictured below is a photo of a Linden tree which was taken last year in Naperville. This is the kind of total defoliation and damage Japanese Beetles are capable of if a tree is left untreated.
This kind of damage is exceptionally hard on the tree because when a tree is totally defoliated for any reason, the tree cannot absorb sunlight for energy, which affects the health of the tree.
If you find Japanese Beetles on your property, give us a call to quote a price for treatment!
Destructive Japanese Beetles are now beginning to hatch at the end of June in and around Naperville. For those of you scheduled for these treatments your first application will occur after July 4th. We don’t want to start applications too early. Remember that your susceptible trees and shrubs will still sustain some damage even with treatment. Spraying against this insect will limit their damage but will not eliminate the damage altogether as they have to do some feeding to absorb enough insecticide to kill them.
If you are not scheduled for treatment keep an eye out especially on your Linden trees as that is their favorite target. They will also attack White Birch, River Birch, Purple Plums, Elms and certain Maples and Crab Apples plus several types of bushes. And call us for an estimate for treatment!
We thought you might find the three photos below of interest. After seeing these, you’ll want to check your own Hawthorns and other trees right now.
In the first photo we see a close up of a Hawthorn tree branch with white fuzzy insects called ‘Wooly Aphids‘ feeding on its branches.
These insects are sucking the sap and depleting necessary nutrients from the tree, which will weaken it over time. These insects are normally accompanied by large numbers of honey bees flying around the infected trees. The bees are feeding on the dripping honeydew produced by the Aphids that lands on the leaves of the tree involved, as well as onto the leaves of plants growing beneath the infected trees.
After Tree Green sprayed the tree, you can see the dead Wooly Aphids that fell on top of the leaves of the Hosta plants that were growing beneath the Hawthorn in this next photo.
The Hawthorn’s branches were Aphid free, but for how long? You can see what we found at the base of the tree, at ground level, just a few days later. Thousands of brand new Wooly Aphids starting to emerge from the ground on their way up the tree to reproduce and feed. Tree Green had to re-treat the tree due to the relentless attack of these insects.
After inspecting your own trees, let us know if you find these critters either on the branches or at ground level. Tree Green can help you eliminate them!