Diplodia 

Diplodia rot in corn is caused by two fungal species found within the genus Stenocarpella: S. macrospora (hereafter, Smacro) and S. maydis (hereafter, Smaydis). Corn is the only known commercial crop host for these globally distributed pathogens, which can infect the ears, leaves, and stalks. In the US, Smaydis is considered the more common species where it severely reduces yield in the Midwestern states (Wise et al. 2016). In contrast, Smacro is thought to be restricted to southern corn-growing states where it has only been considered a minor disease-causing pathogen. Diplodia rot can be confused with several pathogens when symptoms occur on the leaf (Northern Corn Leaf Blight & Goss’s Wilt), stalk (Charcoal, Fusarium, Gibberella), as well as the ears (Gibberella). Identification and diagnosis has been based largely on traditional methods of microscopy and culturing of suspected samples. Due to assumptions in distribution of each species in the US and difficulties in visually differentiating the two Stenocarpella species, it was important to develop a DNA-based test to help detect and quantify these two pathogens.

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 the lab at 701-239-1451 for expedited requests.

Submission Form General

Sample Submission -Soil 

Sample Submission – Seed (disease) 

Sample Submission – Plant (disease)