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4 Step Weed Control Plan for Corn or Soybeans

Since the 1960’s farmers have been using herbicides to control weeds. Frankly, herbicide formulations haven’t changed that much and the weeds have managed to find ways to adapt. Todd Gleason has this four step plan from the Univesity of Illinois to control them in corn or soybeans.

Some weeds have become resistant to the herbicides farmers use to control them. Others have lengthened their germination period, emerging later in the season, avoiding early spring control methods. University of Illinois Extension Weed Scientist Aaron Hager has a four step plan farmers can use to maintain a competitive edge in corn or soybeans. It starts by planting into a weed free seedbed.

Quote Summary - It is easy to achieve a weed free seedbed by either replant tillage, burndown herbicide or a combination of those two. Given the challenges of weather and of resistant populations it is advisable not to plant into existing weed populations or any green vegetation without adequate control ahead of time.

Step two in the plan is to select an appropriate residual herbicide. Be sure it provides very good control of the most problematic weed species in a given field. Pay attention to the label, says Hager, and always apply the recommended rate for the spectrum of weeds in the field.

> Quote Summary - The third step is to make timely post emergence applications. Base those on just not the number of calendar days after planting, but rather base those post decision on adequate scouting. So, return to the fields about two weeks after crop emergence. Scout the fields and determine the weed size, crop development stage and make the decision on a timely application of a post herbicide.

The final and fourth step is to go back to the field seven to ten days later and evaluate how well the post emergence herbicide application worked. It may be that another germination of a weed species warrants a second application. This won’t be know without a return trip.

If we fail to go back and look at how well the product performed, or the level of crop injury we see soon after that application, we could have some very significant challenges later in the growing season.

The days of set-it-and-forget weed control have ended. Todays farmers must scout fields for competitive weeds before during and after the growing season.

Free & Confidential Tile Line Water Test at Farm Progress Show

Nine states in the Mississippi River basin have developed strategies to control the amount of nitrogen and phosphorous making its way to the Gulf of Mexico. These plant nutrients contribute to the Hypoxia Zone. During the Farm Progress Show the Illinois Corn Growers Association is offering free tile line water sample testing to help make farmers aware of the plan and the problem.

Let’s start with the problem. The fertilizers used on lawns, gardens, and farms doesn’t always stay put. It leaches into streams and rivers and is carried to the Gulf of Mexico where the plant nutrients cause great algae blooms. These deplete the water of oxygen and aquatic life.

The plan is to voluntarily reduce the plant nutrient load. The first step says Illinois Corn Growers Director of Communications Tricia Braid is to make farmers aware of just how much nitrogen is being lost from their fields. That’s why the Corn Growers are offering free water sample testing at the Farm Progress Show.

Quote Summary - Because farmers want to keep the nutrients applied for the crop where the crop needs it. If it is starting to move out of your tiles, that is lost money for the farmer and also a potential problem for the water quality. So we are working at awareness here and helping people get an understanding of what nitrogen movement means on their farms.

This awareness campaign is also related to the recent release of the Illinois Nutrient Reduction Loss strategy. It is a document put forth by the Illinois Environmental Protection Agency and the Illinois Department of Agriculture that sets some clean water goals for all the stake holders in Illinois to achieve.

Quote Summary - So, agriculture plays a big part in that. We are not the only people involved. We understand that, but we certainly do have a role to play. The example we have for the Decatur area, the site of the Farm Progress Show, is that on average tile drained ground in the Sangamon River Watershed loses about 26 pounds of nitrogen per acre per year. That adds up. If it is leaving the tile, it is not helping the crop, and it is going somewhere unintended. We really want folks to understand how nutrients are moving at different times of the year.

Those wanting to have their tile line water tested can bring an 8 ounce sample to the Illinois Corn Growers Association tent at the Farm Progress Show. Collect the sample within 48 hours of arriving. Keep it refrigerated until you leave for the show. If you’d like more results you can do a flow test. Just count off how many seconds it takes the tile line to fill a five gallon bucket.