Plant and Insect Diagnostic Clinic Update - November 5, 2008

The following are a few of the samples or questions received the past two weeks.


Insects


We usually find baldfaced hornet nests in the fall of the year when the leaves fall from the trees, but on some occasions the nests are much more obvious. Roger and Muriel Points shared this photo of a hornets' nest attached to their house. See our website for more information. Baldfaced hornet nest.  Photo by Roger & Muriel Points


Baldfaced hornet nest. Photo by Roger & Muriel Points


 


Spiders continue to wander indoors and bother many Iowans. The most common one we see each fall is wolf spiders. There are many different species of wolf spiders in Iowa and some are quite large. Although it is not fun to see a great big spider on the kitchen floor, wolf spiders are not poisonous. No control is needed and the problem stops with colder weather. In the meantime just carry the lost wanderers back outside. Please see HHPN Sept. 12, 2007.


Diseases


We have received several samples of blue spruce with sudden needle drop (SNEED). For more information on SNEED please see HHPN Feb. 6, 2008.


We also received a sample of phytophthora on viburnum. Root rots caused by phytophthora and other fungi are a common problem on ornamental plants. Please see this information from Utah State on phytophthora rot rots of ornamentals.

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