No. 11/September 28, 2020

Pine Beetles
Recently, I’ve received a few inquiries about various beetles on pine trees, so I wanted provide a recourse to our readers understand the injury they’re seeing. This article gives brief descriptions of some common beetles that feed on living, declining and dead pine trees in the Midwest and the type of injury they produce.

Guignardia Leaf Blotch
Guignardia leaf blotch is fungal disease that affects the common horsechestnut (Aesculus hippocastanum) and many other Aesculus species. The disease occurs annually on many host trees, with symptoms intensifying throughout the summer.

Ornamentals Manual Revised
The Illinois Pesticide Safety Education Program’s Ornamentals Manual (SP39-3) has been updated for 2020 and is now available on the University of Illinois Extension PubsPlus storefront ( Each copy of the manual costs $15 plus shipping and handling.

Household Hazardous Material Collection Events Scheduled for Fall 2020
Fall can be an excellent time for cleaning up your chemical storage area. Now is the time to get rid of any old or unwanted pesticides while this growing season’s use is still fresh in your mind. The household hazardous material collection schedule has been released to the public. More information can be found below. Here are a few options you have for disposing of your old or unwanted pesticides: