Plant and Insect Diagnostic Clinic Update - May 16, 2012

The following are highlights and updates about samples and questions recently received in the Plant & Insect Diagnostic Clinic:

Lots of reports this week of eggs and caterpillars on the sides or homes or indoors.  All those fuzzy brown moths have been laying eggs.  Usually the eggs will be on the house near outdoor lights that attracted the moths.  The eggs are and caterpillars are harmless. See picture below.

Bat bugs are possible any time of the year, including now as recent samples would indicate.    Determining bat bugs from bed bugs takes good magnification and experience.  Knowing the difference is critical, too.  Are you going to treat the bedroom or build out the bats?  To find out which you have, send us a sample!


Evergreen with needle browning due to environmental stress (wet or dry weather) and the April freeze.

Summer patch and leaf spot (lawn)

Fireblight on ornamental bradford pears.

White mold on tomato.

Oak wilt.

Tomato with herbicide damage - tomato are very sensitive to 2,4-D and dicamba and other growth regulator herbicides that are commonly used by homeowners.  Be cautious when treating weeds near tomatoes or using grass clippings as mulch.

Moth eggs on a house.  Photo courtesy of Steve Odson.


Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Horticulture and Home Pest News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on May 16, 2012. The information contained within may not be the most current and accurate depending on when it is accessed.