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

Consider the economics first before spraying fields for Aphids or weeds

This article is available as a PDF or Audio message.

When aphids and weeds start showing up in area wheat and corn fields, farmers need to consider the cost of herbicides before application according to Jill Scheidt, agronomy specialist with University of Missouri Extension.

“I scouted fields on April 9 around Golden City and see any aphids yet but temperatures were still cool,” said Scheidt. “If temperatures are below 60 degrees, aphids are not active. If aphids are not present in wheat fields and if temperatures are below 60 degrees, an insecticide is not economical to apply.”

Kevin Bradley, a state weed specialist with University of Missouri Extension, recommends a two-pass herbicide program when spraying corn.

“Over the past 11 years, in 67 percent of corn trials, the highest yield was obtained by using a pre-emergent, followed by a post-emergent herbicide application; regardless of whether you plant conventional or not,” said Bradley.

The economic threshold level of weeds depends on species and growth stage of the weed.

To estimate weed density in wheat, count the number of plants in a square foot in 5 to 10 random places in the field. If weeds make up more than 30 percent of the plant population in that square foot, treatment is justified.

“If weeds make up 5 to 29 percent of the plant population, wheat prices and herbicide costs should be considered first,” said Scheidt.

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.

2014 Century Farms search continues

If your farm has been in your family since Dec. 31, 1914, you can apply to have it recognized as a Missouri Century Farm.

To qualify, farms must meet the following guidelines: The same family must have owned the farm for 100 consecutive years. The line of ownership from the original settler or buyer may be through children, grandchildren, siblings, and nephews or nieces, including through marriage or adoption. The farm must be at least 40 acres of the original land acquisition and make a financial contribution to the overall farm income.

For applications received by May 1, a $65 fee covers the cost of a certificate, farm sign and booklet for approved applicants. If the application is received between May 1 and May 15, the cost is $75. Applications must be postmarked by May 15, 2014, to be considered.

For application forms and information, call MU Extension Publications toll-free at 1-800-292-0969, contact your local MU Extension center or visit the program website at

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