The warm and wet growing season of 2011 set the stage for an explosive level of late-season corn diseases such as stalk rots, ear rots and foliar diseases. Among the foliar diseases which quickly emerged as a significant issue to growers was Goss’s Wilt. The disease, typically a western Nebraska and Colorado issue, moved east throughout the Corn Belt.
What is it?
Goss’s Wilt is a persistent and economically serious disease of susceptible dent, food-grade and sweet hybrids. Unlike many of the common corn diseases seen throughout the season, Goss’s bacterial wilt and blight of corn is caused by a bacteria rather than a fungus. The disease is common following severe weather events such as hail, heavy winds or heavy rainfall. States in which Goss’s Wilt was reported in 2011 include: Nebraska, Kansas, Colorado, Wyoming, South Dakota, Iowa, Illinois and Indiana.
What to look for?
Goss’ Wilt symptoms are often confused with other foliar diseases such as Stewarts Wilt, Northern Corn Leaf Blight or Diplodia. Some of the distinguishing symptoms of Goss’s Wilt include:
- Gray to light yellow lesions with wavy margins that follow the leaf veins
- Dark green to black spots of “freckles” on the surface within the infected area of the leaf
- Symptoms will progress to kill large portions of the canopy and can result in plant death
- Severe symptoms can be confused with drought stress
Options for Control
There are no in-season control options available to the grower. Foliar fungicides are not effective in the control of this disease.
What can you do?
Your best defense against Goss’s Wilt is to plant corn hybrids with high levels of tolerance.
With the wide array of diverse genetics available to GreenLeaf, we are able to assemble a portfolio of hybrids that are highly tolerant to Goss’s Wilt. Talk to your sales representative about which hybrids are a good fit for your area.
This Tech Bulletin is provided for reference and information purposes only. GreenLeaf makes no representation or warranty as to the completeness or accuracy of the information contained herein. IN NO EVENT WILL GREENLEAF BE RESPONSIBLE FOR DIRECT, INDIRECT, CONSEQUENTIAL, OR SPECIAL DAMAGES RESULTING FROM THE USE OF OR RELIANCE ON THE INFORMATION CONTAINED HEREIN. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESSED OR IMPLIED, OF MERCHANTABILITY, FITNESS FOR A PARTICULR PURPOSE, OR OF ANY OTHER NATURE ARE MADE HEREUNDER WITH RESPECT TO THE INFORMATION PROVIDED HEREIN OR THE PRODUCTS TO WHICH THE INFORMATION REFERS.
Source: GreenLeaf Genetics