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 2018 weekly scouting reports, print the 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. 

Crop Scouting Enrollment Form (PDF)

Current report

 Scout Soybeans for Insects 8-1-2018  

Hello, this is Jill Scheidt, MU Extension agronomy specialist, with your August 1st crop update.


Fields were scouted west of Lamar, along Hwy O.


Corn ranged from 1/8-1/2 black layer.


Soybeans ranged from double crops in the 5th trifoliate to first crops setting pods.


Little to no active insect activity present. No diseases seen.


Continue scouting for podworms in blooming or further along soybeans by violently shaking plants to knock insects to the ground. Treatment is justified for 1 podworm per foot of row or when 5% of pods are damaged.


Spider mite populations increase under hot dry conditions and can cause economic damage. Several groups of insect predators effectively control spider mites. However, these natural enemies are more susceptible to insecticides, therefore, chemical control, may increase spider mite damage later in the season.


Spider mites are small and typically occur on the undersides of leaves; look for yellowing leaves and check undersides for silvery webbing. In soybean, insecticide is warranted when spider mites are present, and foliage yellowing reaches 20 % before pod set, or 10 % yellowing after pod set. Most pesticides do not kill spider mite eggs, therefore additional applications are sometimes necessary 5 days after the initial treatment. Heavy rains may reduce spider mite populations.


Call 417-682-3579 for more information, thank you.


MU Extension
University of Missouri Extension programs focus on the high-priority needs of Missourians to improve lives, communities and economies by providing relevant, responsive and reliable educational solutions. Each county extension center, with oversight by locally elected and appointed citizens, is your local link to practical education on almost anything. More information on this topic is available online at


Links to other resources:

Recommended fungicides for stripe rust

University of Florida velvetbean caterpillar information

"Estimating Corn Grain Yield prior to Harvest"  (Purdue University

“Grain Fill Stages in Corn” article from Purdue University

2015 Pest Management Guide

Make the most from late planted soybean

Assessing soybean plant stands


Current soil temperatures in Lamar are updated every five minutes and can be found at