Research Updates on Soybean Vein Necrosis Virus

Soybean Vein Necrosis Virus (SVNV) is a relatively new virus of soybeans.  Currently, SVNV is the most prevalent virus in soybean production in the United States.  Surveys in Delaware in 2015 detected the virus in over 72% of fields, with 69% of full…


Research on novel evolution of wheat fungal pathogens

Toxins are one means that some fungal pathogens can circumvent plant defenses and cause disease.  For example, the ToxA toxin, produced by the tan spot pathogen (Pyrenophora triciti-repentis) is responsible for disease in many susceptible wheat varieties.  We know that bacteria may share…


Keep an Eye on Your Small Grains

El nino is really making it an interesting winter.  On one hand, the excessively warm temperatures have  helped produce some really nice wheat and barley stands.   On the other hand, the extended warm weather may potentially increase the risk of some diseases.  The…


New Research on Endophytes for Suppressing Fusarium head blight

Endophyes are microbes that exist within plant tissues.  These presence of these organisms are often not noticed because the organisms do not present any outward symptoms.  They can be found locally in specific tissues, or spread throughout tissues.  Some endophytes have been identified…


Nematode Assay Service open through November 13

The UD Nematode Assay Service will be open through November 13th, 2015.  After this time the assay service will be closed until the new year.  Below is the link to the service.  Please pay particular attention to sample submission guidelines. http://extension.udel.edu/ag/plant-diseases/nematology/  


The Mystery of Green Stem Disorder in Soybeans

Green stem disorder has been observed in many fields throughout Delaware and Maryland this season.  This disorder is characterized by plants that remain green in parts of a field, thereby preventing a timely harvest.  Sometimes green stem occurs in single plants, other times…


Correlation, Causation, and Scouting

Often, late season issues result in the submission of senesced, dead, or decomposing samples to extension plant pathologists or diagnostic clinics in the hope that an answer to a potential issue can be derived from such samples.  Unfortunately determining the potential cause of…


Weeds as Alternative Hosts for Goss’ Wilt

Goss’ Wilt is an emerging issue in corn production.  Although the bacterial disease has yet to move into our area, it has spread throughout corn production areas in the Midwest and parts of Canada.  Currently, rotation and tillage are the only means of…


Factsheet on Stagonospora Glume Blotch now Available!

Growers in the mid-Atlantic often encounter issues with Stagonospora leaf and glume blotch.  A new factsheet is available that discusses this disease, how it works, and what you can do to minimize it’s impacts. To access the factsheet click this link: Stagonospora leaf…


Soybean Cyst Nematode- Know your numbers

Soybean Cyst Nematode (SCN) is our most important and yield limiting “pathogen” in soybeans.  Now is the time to be checking your fields to have SCN egg numbers monitored.  Need to know more about SCN and how to sample?  Clink here for a…


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