Weekly Crop Scouting Report

April 15 - Aphid numbers increase in wheat fields

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Wheat is in the joint stage according to Jill Scheidt, agronomy specialist with University of Missouri Extension. Scheidt scouted fields in Arcola and east of Irwin on April 15.

“Apply nitrogen as quickly as possible to avoid burning leaves and damaging plants, if an application is needed,” said Scheidt. Nitrogen applications just before the joint stage will offer the greatest benefit to yield because it supplies the plant just before its greatest need for nitrogen.

One to six bird cherry oat aphids per foot of row, threshold is 12-15 per foot of row and 120 greenbug aphids per foot of row were seen, threshold level is 300-500 per foot of row. Apply 1.3 to 1.9oz/acre of Warrior or 3.2 to 4oz/acre of Mustang to control aphids at threshold levels. “Aphids vector barley yellow dwarf virus which causes a yield reduction due to shriveled, light weight kernels. Barley yellow dwarf virus is identified by stunted plants that are mottled yellow-red in color, especially near the tip of the leaf,” said Scheidt. Scheidt recommends scouting for aphids on the underside of leaves and when it is cooler, scout for aphids near the crown of the plant, as they move closer to the ground when it is colder.

“If corn is up, scout for black cutworms near the base of the plant and up to 2 inches deep in the soil. Scout until corn has reached the 8-leaf stage,” said Scheidt. Black cutworms are gray to black colored worms that curl into a “C”-shape when disturbed. Black cutworms can clip corn plants at or just above soil level,” said Scheidt. According to Scheidt, no significant black cutworm moth numbers have been caught in insect traps located just east of Lamar.

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.

Additional resources:

2015 Pest Management Guide


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