Log In or Register
HomeLocal NewsState NewsSportsOpinionObituariesAgriculture
Quick Links
  Home
  My Bulletin
  Contact The Bulletin

Marketplace
  Display Ads
  Classifieds
  Dir. of Advertisers

Opinion

Learning from the hearing

Gubernatorial race: Rural vs. urban

More opinion

Ag News

NFU questions ‘Waters of the U.S.’ rule

Organic cropping system and cover crop tours set

More Ag News


Email Article | Print Article
Agriculture - Ag News
 
Soybean growers: Watch for stem, root rotsTell North Platte what you think
 

Stem and root rots continue to be a problem in several Nebraska soybean fields and in northern Nebraska white mold has been reported in several fields, a University of Nebraska-Lincoln Extension plant pathologist says.

NebraskaLand National BankYou've got a
facebook Request!
CLICK HERE!

"We also continue to see brown stem rot, phytophthora root and stem rot, and sudden death syndrome," said Loren Giesler, UNL Extension plant pathologist.

White mold, also known as Sclerotinia Stem Rot, is a disease that starts earlier in the season during flowering. The actual infection occurs on the senescing flower which serves as a food source for the fungus, Giesler said.

"Therefore, all infections in soybean typically start at a node," he said. "You can even tell when the infection occurred based on how high up the plant the stem lesions and fungal growth are. The cool wet conditions that occurred during flowering were favorable for infection, and the cool temperatures the last couple weeks were very favorable for fungus growth."

During this soybean growth stage, symptoms will appear in individual or small pockets of dead or dying plants. Upon close inspection growers will see a white cottony fungal growth on the stems.

There also may be dark black bodies (sclerotia) of the fungus on the stems. If it is drier and plants are dead, the stems will be very light (bleached) in color. When dead stems are split, often growers will see sclerotia of the fungus inside.

Since further spread will be limited to localized spread (no sporulation stages) from plant to plant, soybean growers' management decisions will depend on how widespread the plant infections are.

Giesler said he's received several calls regarding whether a fungicide should be applied.

"While there is no good data on this, if producers are seeing widespread infection of plants across the field, there may be some benefit from treating," he said.

Many fungicides are labeled for Sclerotina Stem Rot and could stop the disease from spreading to adjacent plants.

However, soybean growers should keep in mind that the disease will not spread much if temperatures are in the 90s, as predicted for the next week or so. The optimum temperature for growth of this fungus is 75 degrees Fahrenheit.

Now the best action is to make sure the problem is identified so it can be managed in the future.

For more information, visit UNL Extension's crop production newsletter CropWatch at http://cropwatch.unl.edu/web/cropwatch/archive?articleID=5381692.

As with any disease, correct diagnosis is critical to proper management. For more information or to have plants diagnosed, visit the UNL Plant and Pest Diagnostic Clinic at http://pdc.unl.edu/home.


Like this story to send to your facebook

The North Platte Bulletin - Published 8/29/2013
Copyright © 2013 northplattebulletin.com - All rights reserved.
Flatrock Publishing, Inc. - 1300 E 4th St., Suite F - North Platte, NE 69101
 
Show me Talk Back during this visit
 
 


Copyright © 2003 - 2014 northplattebulletin.com
All rights reserved.

Flatrock Publishing, Inc.
1300 E 4th St., Suite F
North Platte, NE 69101

 
Your Ip Address - 54.89.106.125
North Platte, Nebraska