The University of Delaware Nematode Assay Service processes samples on Tuesdays of each week. This fee based service provides identification and enumeration of plant parasitic nematodes in soil and plant tissue. The next set-up date will be August 21, 2012. Please note fee changes, and utilize the new form available as a pdf on the website, available by clicking here. A completed form must accompany submitted soil samples. Troubleshooting plant and root samples may be submitted at any time. For more information visit the UD Plant Diagnostic Clinic website or call 302-831-1390. The Clinic is located in 151 Townsend Hall, 531 South College Avenue, Newark, Delaware. A parking space for sample drop offs is located behind Townsend Hall.
For a useful video on how to sample for nematodes, visit the University of Delaware College of Agriculture and Natural Resources YouTube page. Or, see this video for diagnosing nematode damage in the field.
TCD on black walnut – image courtesy of Karen Snover-Clift, Cornell University
Thousand Cankers Disease (TCD) of black walnut was found in central Virginia along I-95 in 2011, and later that year in Bucks County, PA. TCD is a disease of walnut trees, Juglans spp., and it has continued to spread east in the last few years, after initial finds in the Western U.S. and Tennessee. The causal fungus is carried by the very tiny walnut twig beetle. Small cankers form under the bark of the tree, and ultimately trees die. Yellowing and dieback in the tops of trees are usually the first symptoms. Native black walnuts in Delaware are at risk.
Contact the UD Plant Diagnostic Clinic for information.151 Townsend Hall, 531 South College Avenue, Newark, DE. (302) 831-1390.
Click here for a fact sheet about the disease.
We are pleased to announce that there is a new parking spot for 15 minute drop-offs in the main Townsend Hall parking lot. The spot is outside of the north end of Townsend Hall, next to the motorcycle parking area, and down the row from the handicapped spots. This will be very helpful for the Plant Diagnostic Clinic and Soil Testing Program.