Category Archives

Archive of posts published in the category: Vegetables

Prothioconazole 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 they are not …


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.  To learn more about CRISPR and it’s potential for disease management…


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 for assistance with nematode identification, enumeration, and…


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.  


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…


New fungicide with excellent Oomycete control available soon

Syngenta announced today that it has received EPA approval for Orondis, a new high-performance fungicide that has been shown to be very effective in suppressing several important vegetable oomycete diseases. First sales are expected next season. Data from vegetable trials in our area…


Alert-Late blight nearby

“Late blight has been found on two tomato fields near Chester and Long Valley in Morris County, New Jersey. This is the first report of late blight in the state and region to date”-Andy Wyandt Rutgers With the recent wet weather, it is not surprising that…


Stop sale on Nimitz nematicide lifted

The stop sale that was briefly placed on Nimitz® nematicide due to potential label issues is over. The new label has removed tomatoes from the list of labeled crops for the short term. The link to the new label can be found here:…


Explaining Late Blight Lineages

Late blight is a disease that we deal with to some extent in the mid-Atlantic each year.  When reports come in you may see something mentioned about the lineage that was detected.  What exactly are we telling you when we mention this information? …


Cucumber downy mildew present in South Carolina

It is still very early for the onset of downy mildew of cucumbers and other cucurbits in Delaware and Maryland. These diseases cannot overwinter here, and must be reintroduced to our area each year from cucurbit crops in the South. This year, the…