Weekly Crop Scouting Report

March 25 - Aphids found, temperatures may kill

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Wheat is in the green up stage and about eight inches tall in most area fields according to Jill Scheidt, agronomy specialist with University of Missouri Extension, who scouted fields in Arcola and north of Lamar on March 25.

"Quite a bit of henbit and chickweed among other annual weeds are being seen in wheat fields. Now is the time to treat for henbit and chickweed; herbicides are most effective when applied to weeds under two inches in height or diameter," said Scheidt.

Winter annual weeds can cause up to 37 percent yield loss. Scheidt says to apply herbicides, like Harmony Extra at a rate of .45 to .9 oz/acre, before these weeds flower and at temperatures of 60 degrees or more.

During this week's scout, Scheidt also found three to four bird-cherry-oat aphids per linear foot of row. Aphids are usually active when temperatures reach 60 degrees.

"As temperatures warm, aphids become less cold tolerant and do not withstand dramatic fluctuations in temperature," said Scheidt. "Lower temperatures this weekend could kill some of them. In temperatures lower than 60 degrees they can be found near the crown, otherwise they will be on the underside of the leaf."

Threshold levels for bird-cherry-oat aphids, identified by a red band near the rear, are 25 aphids/foot of row. At this level an insecticide treatment such as 1.3 to 1.9oz/acre of Warrior or 3.2 to 4oz/acre of Mustang is justified.

Consult the MU Extension 2015 Pest Management Guide for specific pesticide instructions.

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.

Previous weekly crop reports


2015 Crop Scouting Program enrollment

The Crop Scouting Telephone Update informs producers of pest threats.  A weekly, 2 minute recorded message and an email is sent out containing research based information on: environmental issues, nutrient deficiencies, pest threshold level, pest description, damage description and pest control.  Several fields in Barton County and surrounding counties are physically scouted each week; the report is based on those observations. 

Weekly scouting begins in mid March and ends in November; monthly telephone and email updates run November to February.

The cost of the program is $35 per phone number, $95 for three numbers and $30 per phone number for four or more numbers. 

The weekly field scouting report is sponsored by University of Missouri Extension and Barton County Extension.  To receive the 2015 weekly scouting reports, print the 2015 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.

2015 Crop Scouting Enrollment Form


Search for Missouri Century Farms continues

If your farm has been in your family since Dec. 31, 1915, 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.

Applicants certified as owners of a 2015 Missouri Century Farm will be recognized by the local MU Extension office in the county where the farm is located. Applicants are presented with a sign and a certificate.

Since Missouri began the program in 1976, more than 8,000 century farms have been recognized.

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, 2015, to be considered.

For application forms and information, call MU Extension Publications toll-free at 1-800-292-0969, contact your local MU Extension office, 682-3579, or visit the program website at http://extension.missouri.edu/centuryfarm.


The Crabtree family was honored as Barton County's newest Missouri Century Farm at the 2014 Lamar Fair.

Links to other resources:

Current soil temperatures in Lamar are updated every five minutes and can be found at http://agebb.missouri.edu/weather/realtime/lamar.asp

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