Northern Corn Leaf Blight

Exserohilum turcicum is a destructive fungal pathogen that infects leaves of corn, sorghum and grass species. As the causal agent of Northern Corn Leaf Blight (NCLB), yield losses associated with this disease can be extensive, upwards of 50% in susceptible hybrids when the disease develops early in the season, prior to tasseling. However, when disease severity is minor or its development has been delayed until well after silking, yield impacts are usually minimal. The ideal conditions for NCLB include high humidity under the canopy with moderate soil temperatures. Having a history of NCLB in the field or in nearby fields is the most important factor impacting disease development. The ability of the fungusto survive from year to year in infected corn residue makes it a perpetual problem once the disease has developed in the area.

In-field symptoms of NCLB can be mistaken for other pathogens, including gray leaf spot (Czm) and bacterial leaf streak (Xvv). With no way to eradicate the fungus from a location, management of NCLB becomes the focus, especially since the effectiveness of in-season treatments (fungicide applications)may rely on early and accurate diagnosis.

 

 

Pricing

Green Plant Tissue & Seed Testing

1 – 10 sample submission……………..…………………..…..……….$90/sample

11 + sample submission…………………………………….…..………$30/sample

Soil & Residue Testing

1 – 10 sample submission……………..……………..……….……….$120/sample

11 + sample submission…………………………..……..……..………$40/sample

 

Current Turnaround Time: Less than 30 days

Rush testing is available for a surcharge. Please contact Megan O’Neil at 701-239-1449 for expedited requests.

 

Submission Form General

Sample Submission -Soil 

Sample Submission – Seed (disease) 

Sample Submission – Plant (disease)