The Bulletin Archives - Page 55 of 78

Marestail Control Prior to Planting

May 4, 2016
Aaron Hager

Marestail can be one of the most challenging weeds to control prior to planting no-till soybean. Already this season some have reported poor marestail control following applications of glyphosate plus 2,4-D. Poor control can be caused by several factors, including large plant size and resistance to glyphosate. If a marestail population is resistant to glyphosate, a pint of 2,4-D in the spring is generally inconsistent/ineffective when it’s the only product in a tankmix active on the resistant population.…

Read This Article

Black Cutworm Activity Increasing Across Illinois

April 27, 2016
Kelly Estes

*Edited April 28 to include significant flights and projected cutting dates for Carroll, Effingham, and Ford counties.
Black cutworms have been observed in traps across the state for the past couple of weeks. Several counties have reported significant moth flights (9 or more moths over a 2-night span). We can use the date of the significant flight to predict potential cutting dates based on degree day predictions.

For more complete information about the biology,…

Read This Article

Stripe Rust Observed in Madison County Wheat

April 21, 2016
Aaron Hager

Retired commercial agriculture Extension educator Robert Bellm observed stripe rust yesterday in several wheat fields in Madison County (Figure).
Figure. Stripe rust in winter wheat, Madison County, IL, April 20, 2016 (photo credit: Robert Bellm).
Rust pathogens are obligate parasites, meaning that they need a living host in order to survive. Wind and rain systems from further south bring spores to our area. This is why rust sightings in states to the South can help us in Illinois anticipate its arrival.…

Read This Article

Planting Date: Corn or Soybean First?

April 19, 2016
Emerson Nafziger

Corn planting in Illinois has gotten into gear over the past week, with 12 percent of the state’s crop planted by April 17. That’s close to the planting pace of a year ago, and is behind the 5-year average only because that average includes 2012, when nearly half of the state’s corn crop was planted by mid-April. Illinois corn yield averaged 105 bushels per acre in 2012, while in 2014, the year with the record-high corn yield of 200 bushels,…

Read This Article

Spring Nitrogen Management for Corn

April 18, 2016
Emerson Nafziger

Even though the price of nitrogen fertilizer has dropped some in the past year, the lower price of corn means that decisions about N management need to be made carefully, with an eye towards maximizing the return to this critically important input.
The return of dry weather over the past week and the forecast for the coming week has lessened the concern about N loss, though we still need to consider the possibility that some fall-applied anhydrous ammonia might have moved out of the upper part of the soil.…

Read This Article

Is Fall-Applied Nitrogen Still Present?

April 8, 2016
Emerson Nafziger

The pattern of warmer and wetter than usual weather this past winter has changed some in the past two months, but hopes for a warm, dry, early spring have faded as well. Concerns remain about how much fall-applied N might have been lost and about whether and how this should change how we manage N this spring.
Most Illinois producers waited until soil temperatures had dropped to 50 degrees or less before applying anhydrous ammonia last fall.…

Read This Article

Cover Crop Termination

March 18, 2016
Aaron Hager

The following information about cover crop termination is taken from the 2016 Weed Control Guide for Ohio, Indiana and Illinois. The information was originally written by extension weed scientists at Purdue University.
Cover crops are unique in that most are planted primarily to reduce soil erosion and otherwise enhance soil quality, and are not harvested for their seed, fruit, or forage (although some are grazed or used as forage). Instead, cover crops are terminated before planting of summer annual grain crops such as soybeans and corn.…

Read This Article

A New Way to Look at Soybean Management

February 23, 2016
Emerson Nafziger

The University of Illinois is part of a large, multi-state research project funded by the North Central Soybean Research Program (funded by state checkoff programs) to look at effects of weather, soils, and management on soybean yields.
As part of this project, we need to gather basic information on at least 500 soybeans fields around Illinois for each of the crop years 2014 through 2017. These data will go into a large database that will be used to take a look at how management affects yields in a given soil type and with a certain weather pattern.…

Read This Article

Dicamba-resistant soybean varieties

February 16, 2016
Aaron Hager

On February 3, Monsanto announced its commercial launch plans for soybean varieties resistant to the herbicides dicamba and glyphosate (designated Roundup Ready 2 Xtend varieties). This announcement followed China’s decision to import grain from these varieties. Many weed management practitioners hope this new technology package will provided improved control of problematic weed populations, including those with evolved resistance to glyphosate and herbicides from other site-of-action families. The weed science program at the University of Illinois has evaluated this technology for several years,…

Read This Article

2016 Weed Control Guide Now Available

January 6, 2016
Aaron Hager

The 2016 Weed Control Guide for Ohio, Indiana and Illinois contains 224 pages of weed management information, including weed response ratings for corn and soybean herbicides. Information and recommendations for managing weeds in small grains and forages is included, along with more specific information about and control recommendations for several problem weed species. A pdf of the 2016 Weed Control Guide is available to download, and a printed version of the guide can be ordered at: http://estore.osu-extension.org/2016-Ohio-Indiana-and-Illinois-Weed-Control-Guide-P433.aspx
…

Read This Article