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, extension agronomy specialists and agronomy assistants scout 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 cost of the program is only $35 per phone number, $95 for three numbers, and $30 per phone number for those with 4 or more. For more information about the program, call the Barton County Extension Center at 417-682-3579.
To receive the 2013 weekly scouting reports, print the 2014 Crop Scouting
Enrollment Form, complete and return with payment to Barton County Extension, 801 E 12th, Lamar, MO 64759.
Current weekly report
Podworms are above threshold levels in many southwest Missouri soybean fields
Jill Scheidt, agronomy specialist with University of Missouri Extension in Barton County, scouted fields near 126 and Hwy. O on Aug. 27 for the MU Extension crop scouting program. Scheidt offers this advice from the field.
Corn harvest has begun. Corn should be harvested at fifteen percent moisture. For tips on reducing harvest losses visit our website and search for guide g1290, Measuring and reducing corn harvesting losses- http://extension.missouri.edu/p/G1290 .
Soybeans are in the podding to seed development stage.
“One to five soybean podworms per linear foot were seen in first and second crop soybeans. Threshold levels are one podworm per foot or when 5 percent or more pods are damaged,” said Scheidt. Recommended insecticides are: 2.8-4 ounces per acre of Mustang Max, 1-1.6 ounces per acre Warrior or 4-10.3 ounces per acre Hero. According to Wayne Bailey, state entomologist with the University of Missouri Extension, one podworm per foot of row can reduce yields by 1.9 bushels per acre. Early planting and early maturing varieties can reduce the threat of podworms.
“Milo in the flowering to milk stages should also be scouted for podworms until milo reaches the hard dough stage,” said Scheidt.
Threshold levels are one per seed head when seventy-five percent of the field is affected. The recommended insecticides are: 1.8-4 ounces per acre Mustang Max or 1.3-1.9 ounces per acre Warrior II. Open headed varieties and early planting can reduce the threat of podworms in milo.
“Use higher rates for larger larvae and aim to treat mid-size larvae. Do not spray in the heat of the day; it will result in low effectiveness. Podworm lifecycles last two or more weeks depending on size range of larvae,” said Scheidt.
The weekly field scouting report is sponsored by University of Missouri Extension and Barton County Extension. For more information on this scouting report, or to learn how to receive it a week earlier by telephone, contact the MU Extension Center in Barton County, (417) 682-3579.
Links to other resources:
Scouting for Corn Earworms in corn
Scouting for Armyworms in wheat
"Crop Nutrient Deficiencies and Toxicities"
"Managing Nitrogen in Wet and Dry Years" by Peter Scharf:
MU Extension Corn Insect Pests Diagnostic guide
MU Extension publication G7112, Black cutworm guide
Corn Freeze Damage (PDF)
Spring Freeze Injury (PDF)
Frost Freeze to corn and soybeans (PDF)
2013 Pest Management Guide
Current soil temperatures in Lamar are updated every 5 minutes and can be found at http://agebb.missouri.edu/weather/realtime/lamar.asp