fungicides added around tasseling time have done an excellent job in curbing
southern corn rust in Illinois.
“If we see southern rust moving up to
Illinois around the Fourth of July, that is when we begin getting concerned
about it,” says Carl Bradley, University of Illinois (U of I) Extension plant
pathologist. “In 2009, it showed up early and caused yield losses at Dixon
Springs (where the U of I has a testing site) in southeastern Illinois.
University of Illinois (U of I) trials in 2010
found the most profitable use of strobilurin fungicides occurred when
application was based on:
* Disease risk, such as hybrids susceptible to
disease or hybrids planted in corn-on-corn situations with reduced tillage.
* Scouting that shows disease is present on the
third leaf below the ear or higher on at least 50% of plants prior to tasseling.
leaf spot is a disease that’s increasingly becoming a problem in soybean fields
in states like Illinois. Your first step in fighting this fungal disease is to
plant frogeye leaf spot resistant varieties, says Carl Bradley, University of
Illinois (U of I) Extension plant
Drainage keys agronomics for these Minnesota farmers
Avicta Complete Corn, Poncho/Votivo are two options for farmers.
Several chemical rate controllers feature chemical injection. In these systems, a large tank houses only water. A small amount of chemical is injected into the lines carrying water to spray booms.
These units have several advantages, says Daniel Humburg, South Dakota State University Extension agricultural engineer. They include:
There was a whole lot of agronomy
discussed during this month’s Iowa State University (ISU) Integrated Crop
Management conference. Here are a few things Extension specialists discussed.
Mix ‘em up
Using several herbicide modes of
action in a weed control program is a good component of a diversified program.
One hurdle to this, though, is the perception it will cost more money.
Foreign chemical quality and federal atrazine review are among the issues CropLife America monitors.
Mike Owen has seen some good
things happen in crop production during his career as an Extension weeds
specialist at Iowa State University (ISU). Bad things often come to his mind
first, though. He pointed out several examples to those attending this month’s
ISU Integrated Crop Management Conference.
“When I got here, woolly
cupgrass was not on anyone’s radar,” he says. “It became a huge issue in the
Midwest within 10 years.”
yields are saddled with the reputation that their yields lag those of corn.
Still, a glance backward shows U.S. soybean yields have risen 29% on average
over the past 20 years.
reason? At October’s Syngenta Media Summit in San Antonio, Vern Hawkins,
president of Syngenta Crop Protection, noted the increase is due to: