Weekly Crop Scouting Report

October 7 - Median probability date for killing freeze November 7

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Jill Scheidt, agronomy specialist with University of Missouri Extension, scouted fields near Arcola in Dade County and fields near I-49 and Hwy. 126 and I-49 and Hwy 160 in Barton County on Oct. 7.

Scheidt observed soybeans in the seed development to full seed stage with some leaves changing color and dropping. Podworm pressure should decrease with cooler temperatures. “Podworms and other pod-feeding insects do not prefer to feed on seeds as they mature into the full seed stage,” said Scheidt.

Over 30 years of weather data for University of Missouri suggests the median probability date for a killing freeze begins Nov. 7. “Soybean yield is protected from frost if the plants have reached physiological maturity. If a killing frost occurs before maturity, seeds are not likely to change color”, said Scheidt.

According to Mississippi State University, late Group 4 soybeans planted in early July took about 60 days to get from beginning bloom to maturity and mid-Group 5 soybeans took about 63 days to get to maturity.

“If late planted soybeans are at a high risk for freeze, consider baling,” said Scheidt. University of Missouri Extension researchers recommend harvesting soybean hay or silage when 50 percent of pods have immature beans. Soybean hay quality can vary, but typically has 16-19 percent crude protein and 50-55 percent total digestible nutrients.

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

Make the most from late planted soybeans

Assessing soybean plant stands

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


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