Crop scouting reports
Crop scouting is an essential part of integrated pest management (IPM). Scouting programs are designed to protect and maximize crop yield and quality while minimizing the risk associated with pesticide use.
Each week, an extension agronomy specialist scouts fields in Barton County and then report their findings through an automated phone service and email message. The message will go out to everyone signed up for the program.
The weekly field scouting report is sponsored by University of Missouri Extension and Barton County Extension. To receive the 2016 weekly scouting reports, print the 2016 Crop Scouting Enrollment Form, complete and return with payment to Barton County Extension, 801 E 12th, Lamar, MO 64759 or contact the MU Extension Center in Barton County, 417-682-3579.
The cost of the program is only $35 per phone number, $95 for three numbers and $30 per phone number for those with four or more.
2016 Crop Scouting Enrollment Form (PDF)
Current weekly report
November Update - Green Stem Syndrome in mature soybean fields
Jill Scheidt, agronomy specialist with University of Missouri Extension shares a November crop update.
Scheidt has seen a lot fields with Green Stem Syndrome. “Normally, when a soybean plant matures, it drops its leaves and stems lose their green color. Soybean plants affected by Green Stem Syndrome will not dry down properly and seed may mature before the stem turns brown,” said Scheidt.
The cause of green stem syndrome is unknown, but attributed to many different causes like: viruses, low soil moisture, potassium deficiency, soybean population density, genetic mutations in soybean plants, and insect damage.
Reduced pod number during the full seed stage is an associated cause because carbohydrates and nitrogen remain in the stem and roots and appear to have a role in retention of green stems.
“There were above threshold levels of green stink bug this year,” said Scheidt. When green stem syndrome is triggered by green stink bug feeding, management of the insect may be helpful.
Treatments must be applied when leaves and pods are green and feeding is taking place.
“When green stem syndrome results from viral infection, management is difficult. Managing viruses usually requires controlling the vector of the virus,” said Scheidt.
According to Iowa State University, lower fall humidity and higher fall temperatures can be associated with Green Stem Syndrome- they can lead to faster dry down for the grain, but not stems.
Scheidt does not recommend delaying harvest to allow green stems to dry sufficiently. “Delaying harvest by 3-4 weeks, usually results in exceptionally low seed moistures and increases shattering and harvest losses. So plants affected by green stem syndrome should still be harvested when soybeans reach 13% moisture, even if the stems are still green,” said Scheidt.
The weekly field scouting report is sponsored by University of Missouri and Barton County Extension. For more information on the scouting report, or to learn how to receive the information earlier by telephone, contact the Barton County Extension Center at (417) 682-3579.
Links to other resources:
University of Florida velvetbean caterpillar information.
"Estimating Corn Grain Yield prior to Harvest" (Purdue University
Tiller population in wheat
Scouting for Podworms in soybeans
Scouting for Corn Earworms in corn
Scouting for Armyworms in wheat
Current soil temperatures in Lamar are updated every five minutes and can be found at http://agebb.missouri.edu/weather/realtime/lamar.asp.