Category Archives

Archive of posts published in the category: Corn
Jun
24

Bacterial Stalk Rot on Sweet Corn

With the recent stretch of hot, dry weather, many producers have begun to irrigate their sweet corn.  Consequently, there have been reports of bacterial stalk rot in some areas where surface water or ponds have been used as water sources.  Bacterial stalk rot,…

May
28

Hail damage and fungicides in field crops

With recent hail in the region, some growers may be wondering about the use of certain fungicides (specifically some containing strobilurin active ingredients (QoI FRAC group 11) for the mitigation of plant stress or to protect the plant against wounded plant tissues. Some…

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…

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…

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…

Jul
1

Corn is moving, are you ready?

Corn is starting to take off, and this means that the next set of diseases to keep an eye out will be the foliar diseases.  The most common diseases impacting corn are the residue borne leaf diseases including Grey Leaf Spot and Northern…

May
24

Seedling diseases in corn

Corn planting is underway.  Persistent rain has increased the concern about potential seedling diseases and the need to replant.  Corn seedlings in DE and most of MD can be affected by two main pathogen groups 1) Pythium spp; and 2) Fusarium spp.  Pythium…

Nov
3

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/  

Oct
24

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…

Oct
18

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…

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