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!


Tree Sap Dripping On Your Deck?


Western suburbs homeowners have been calling our arborists complaining about sticky sap falling from their trees. We receive many calls regarding this problem every year, but the calls seem to have increased over the last few years. Sticky, dripping tree sap is always caused by insects feeding overhead, on a variety of trees. Dripping sap is not something a tree just does on its own.

Aphids, Locust Plant Bugs, Mealy Bugs, Adelgids and Scale insects, usually numbering in the tens of thousands, are the most common culprits. These insects pierce the leaves or stems of the affected tree and feed by sucking the sap from the tree. Then their bodies excrete what is referred to as ‘honeydew’. Honeydew is a nice way of referring to the insect’s ‘droppings’ that are raining down on items below it.

Although it is quite early in the season, Locust trees are already being attacked by these insects, and future damage can be severe.

Locust, Maple, Oak, Walnut and Magnolia are just a few of the trees most adversely affected, and damage to the trees can be substantial and visually unappealing as the summer progresses. Even if you aren’t noticing this situation on cars or furniture, look at the leaves on your ‘under story’ trees such as Red Buds and Magnolia. If you see shiny, sappy spots on the leaves, that is evidence that that particular plant either has an insect problem, or a tree rising above it does.

There are a variety of treatments available ranging from spray applications, trunk injections or soil drenching of insecticides. All treatments work extremely well. With treatment the dripping will stop anywhere from within a few days, to a few weeks, depending on which treatment is required based on the type of tree and the insect affecting it.

Clients who have us treat against this situation every year will not experience this problem. If you would like to protect your trees as well, give us a call or email us. We will be happy to inspect your property and recommend a game plan to control dripping sap.


Insect Problems for Western Suburbs’ Trees

You might think that the bitterly cold and harsh winter would affect the insect population in our area.  Yet, it appears the cold winter did not affect insect populations at all. We are actually seeing increases in insect activity.

What to look for? Many insect problems result in sap dripping from your trees.  If your car windshield, deck, patio furniture or kids toys are sticky, you have insect problems. If you see shiny spots of sap on leaves on the lower portions of a tree, or even if your grass feels sticky as you walk on it, you have an insect problem which can be quickly and easily rectified.  A few examples include:

Locust Plant Bugs. If you have a locust tree, and the younger leaves at the ends of the branches are curling and browning slightly, you have Locust Plant Bugs. When you sit on your deck or patio on breezy days and your head is itching, you might see tiny, bright green bugs on your arm.  Those are Locust Plant Bugs.

locust trees
The Locust on the left is under our care. The locust on the right is not.

Magnolia Scale Pods on Magnolia, Cottony Maple Scale Pods on Maples and Lecanium Scale Pods.  These different pods all contain insects that are protected within the pods. These insects have one thing in common; they suck the sap from the tree, weakening it, and their bodies excrete a sticky honeydew which drips from the pods, causing sap drippage.  Later, when the insects emerge from the pods, they excrete the same sticky honeydew from their bodies.
lecanium scale pods on crab tree
This photo shows Lecanium Scale pods on a Crab tree.  They appear to be tiny bumps on the branch that looks like lady bugs.

Examples of other Scale pods can be viewed here. These are just a few examples of what you might notice on your property this year and in years to come. Treating trees for these problems can be extremely effective, but only when using the most effective insecticides along with proper timing. Spraying too early, before the insects emerge from the pods, will have no effect on them.

Tree Green wants to work with you to assure the health of your trees.   Please call our office at 630.668.4350 or email us  if you notice an insect problem or other situation affecting the health of your trees.  A Tree Green Arborist will be out to explain what is going on.