Japanese Beetles and Magnolia Scale Widespread

Japanese Beetles have emerged in the Naperville area, and Magnolia Scale insects are widespread. Now is a great time to inspect your trees. Japanese Beetles attack a wide variety of trees but Lindens are definitely their favorite. If you start to see leaves laying in your yard that resemble those in the photos above over the upcoming weeks, Japanese Beetles are at work.

Other trees to pay close attention to are White Birch, River Birch, Elm, Purple Plum, Cherry, certain Maples, Crabs and a wide variety of bushes.









Magnolia Scale is spreading again. These white pods are full of microscopic Scale insects sucking the sap and nutrients from Magnolia trees. Left unchecked and allowed to overwinter even more Scale pods will appear next year and will ultimately lead to the death of the tree. Magnolia Scale insects cause substantial sap drippage on anything beneath the tree.

If you find either of these issues, it’s time to give us a call!


There has been a resurgence of ‘Bagworms’. These insects feed on several types of pine or evergreen but we are presently seeing them doing a lot of damage to Arborvite.

bagworms - damaged arborvite

a line of arborvite being damaged by bagworms

dried-up individual Bagworm ‘pod’

These insects can do a lot of damage in a short time. There can literally be hundreds present on a single shrub. Bagworms feed while creating a protective cocoon around themselves. Within the pod the female will lay eggs and her offspring will emerge to create more damage both this year and next season.

Above is a 25 second video of a Bagworm hard at work feeding and damaging this Arborvite. Notice the new pods are green at this stage of infestation.

If you spot Bagworms on your property, please give us a call!

Japanese Beetles

Destructive Japanese Beetles will begin emerging from the ground sometime between late June and early July. The timing changes every year. With Spring off to such a late start this year, they could even emerge a bit later as most insect issues were delayed this year.

Japanese Beetles need a certain number of days of ground temperatures being maintained at a certain point before Mother Nature lets them know it’s time to emerge. They will hatch over a period of 5-8 weeks depending upon when their eggs were laid during the previous summer. The earlier a female deposited her eggs into your lawns during the summer of 2017, the earlier they will appear in 2018. Eggs laid later in the Summer will cause those particular beetles to emerge later, however most typically show up in the first 30 days once they begin emerging.

With Japanese Beetles, you can never eliminate or avoid ‘all’ of the damage they do even if you were to spray weekly. We do not advocate spraying that often as it would be too costly. Japanese Beetles emerge from the ground as full sized, ravenous eating machines. Even if someone did spray every week some damage would still occur as these insects have to do some feeding to ingest enough insecticide to kill them. We recommend 2 to 3 spray applications to ‘limit’ or ‘manage’ the lion’s share of their damage.  Read more about Japanese Beetles…

This is a Linden tree 100% defoliated by Japanese Beetles. This is the type of severe damage 2-3 spray applications will avoid.

And these are the cute little critters who caused all that damage. Japanese Beetles attack a variety of trees and shrubs. Be on the lookout.

Summer Aphids…

A few years ago we started receiving calls from clients who had Linden trees dripping copious amounts of sap. Along with that messy, sticky sap came hundreds of bees and wasps feeding from it. Sap was all over anything under or near these trees. Since the Linden is also the Japanese Beetle’s favorite target as well as the Summer Aphids, these trees could really be under attack and weakened by these two different insects. If you notice sap drippage along with the bees and wasps, you might want to let us know before it gets too bad. We can spray to accommodate both types of insects as they require a special mixture of two different types of products.

Remember trees don’t just decide to drip sap. If sap is dripping it is definitely caused by some type of insect. Some are easy to control and some are more difficult.  Let us know if you’re having an issue!