MU Extension's centennial

On May 8, 2014, University of Missouri Extension celebrates 100 years of extending university-based research and knowledge beyond the campus into all 114 Missouri counties. In doing so, MU Extension has strengthened families, businesses and communities.


Weekly Crop Scouting Report 

Scout for Podworms in blooming soybeans

This article is available as a PDF or Audio message.

Jill Scheidt, agronomy specialist with University of Missouri Extension in Barton County, scouted fields south of Lockwood near Hwy. 97on July 23 for the crop scouting program. Scheidt offers this advice from the field.

Corn is in the milk stage and should enter the soft dough stage soon. “Very little Japanese beetles and corn earworms were seen in corn. Corn earworm feed at the tip of the ear while other worms like armyworms feed near the middle or base of the ear. Any injury to the ear will make the ear more susceptible to disease,” said Scheidt. A video from Scheidt about scouting for corn earworms is available online at:

Soybeans are in the third trifoliate and bloom stage, pods should begin to form soon. “Monitor blooming soybeans for podworms. Podworms are many different colors and can have longitude stripes; to differentiate between other worms, look for black dots all over the body, this is an identifier of podworm,” said Scheidt. Threshold levels are 1 per foot of row or when 5 percent or more pods are damaged.

“Not much insect feeding was seen,” said Scheidt. Threshold levels for all foliage feeding insects in soybeans are 30% defoliation before bloom and 20 percent defoliation during or after bloom.

Scheidt says soybean cyst nematodes were found in one field. “If there is an area of stunted growth, pull up a plant and examine the roots for small circular growths, looking like miniature nodules- these are soybean cyst nematodes,” said Scheidt. These parasites can severely stunt growth and reduce yields. In order to manage SCN, rotate with non-host crops like corn, wheat or sorghum and control weeds.

Field with Soybean Cyst Nematodes

Field with Soybean Cyst Nematodes

Soybean Cyst Nematode

Soybean Cyst Nematodes

Links to other resources:

Lodged corn

Soybean insects

VIDEO: A video about scouting for Corn Earworms in corn can viewed at:

VIDEO: A video about scouting for Armyworms in wheat can be viewed at:

"Crop Nutrient Deficiency and Toxicities"

Previous 2014 Crop Scouting Reports

“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

Spring freeze injury

Frost freeze to corn and soybeans

MU Extension publication M171, 2013 Missouri Pest Management Guide

To receive the 2014 weekly scouting reports, print the 2014 Crop Scouting Enrollment Form (PDF), complete and return with payment to Barton County Extension, 801 E 12th, Lamar, MO 64759.

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.


Popular extension publications

MU Extension publication G427, 2011 Cash Rental Rates in Missouri
MU Extension publication G302, 2009 Custom Rates for Farm Services in Missouri
MU Extension publication G6201, Vegetable Planting Calendar