Jan
14

Prothiononazole vs Thiophanate-Methyl for Fusarium wilt control in watermelon

In a past article, I discussed recent research that examined drip application of prothioconazole and thiophanate-methyl for suppressing Fusarium wilt, caused by Fusarium oxysporium f.sp. niveum (FON). Ultimately, this research indicates that application of these fungicides can suppress FON, although it is not…

Jan
4

What is CRISPR?

You may be hearing a lot about a new molecular technology called CRISPR in the popular press.  This tool offers many opportunities, from curing debilitating diseases, to improving disease resistance of crops.  Recently, the American Phytopathological Society published a great article on the…

Dec
12

2017 Nematode Assay Service Note

The University of Delaware will not offer an open nematode assay service in 2017.  Growers and other professionals with urgent issues can contact their local extension agriculture agent or Dr. Nathan Kleczewski at 302-300-6962 or nkleczew@udel.edu for assistance with nematode identification, enumeration, and…

Dec
8

2016 Soybean Vein Necrosis Disease survey and Thrips Data now Available

We have been studying Soybean Vein Necrosis Disease in the Delaware/Maryland region since 2013 to better understand the disease and if it may have an impact on our soybean production.  The disease is caused by a virus, and moved from plant to plant…

Nov
22

Research on Information Exchange

Information exchange is important for dealing with plant disease issues.  When a disease related issue occurs, it is important for those affected to understand the issue and have access to solutions from reputable sources.  In addition, exchange of knowledge among researchers is crucial…

Oct
31

Help us gather information on Fusarium Head Blight

The University of Maryland and University of Delaware, through funding through the USWBSI, MD Grain Producers, and MD Commodity Board, run a misted nursery to screen commercial varieties of wheat for Fusarium Head Blight resistance and tolerance to vomitoxin (DON) accumulation.  We would…

Oct
23

Bacterial Leaf Streak- Something to Look For in 2017 Corn

Bacterial leaf streak (BLS) is a new bacterial disease affecting corn in the United States.  The disease has been present in Nebraska corn fields at detectable levels since 2014, but was only recently positively identified.  The disease has been detected in nine states…

Sep
22

Best Management Practices for Dickeya in 2017 Potatoes

Avoid purchasing varieties (with lot numbers) which are known to have Dickeya from any source. Do not purchase seed from those growers/brokers with a known history of Dickeya. Do not rely on Blackleg tolerance levels reported on the North American Seed Health Certificates…

Sep
9

Brown Stem Rot in DE Soybeans

Brown Stem Rot (BSR) is a fungal disease of soybeans that has never been positively confirmed in the Chesapeake Bay area, although suspect plants have been occasionally observed over the years.  We have not observed significant levels of this disease, but it will…

Aug
24

Stalk Rots in Corn

Stalk rots are one of the most frequent and damaging issues for corn production.  Corn plants produce sugars (carbon) through photosynthesis.  These sugars are used as energy for growth and tissue maintenance.  Extra sugars are stored as free sugars and starch in the…

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