It is never too early for farmers to start thinking about their 2010 weed control plan, a Purdue University specialist said.
"The most common weeds to keep an eye on for 2010 are marestail, giant ragweed, common ragweed, common water hemp and volunteer corn in soybean fields," said Bill Johnson, Purdue Extension weed specialist.
All of those weeds can be treated with glyphosate, but have occasionally survived control methods.
"Although each farmer's situation is different, some basic strategies should help all producers," Johnson said.
First, farmers should note what weeds have been common in their fields previously, Johnson said.
"Knowing what weeds were an issue for 2009 will give producers a good idea about what may be in store for 2010," he said. "Each year there will be some variation between fields due to crop rotation, soil type and the local complex of weeds in the area. Each filed should be observed and managed as if it contains its own set of weed problems."
Second, producers should develop a plan for the upcoming growing season.
"Farmers should look at the Weed Guide for Ohio and Indiana and keep in contact with chemical dealers to determine what herbicides will suite them best," Johnson explained.
The Weed Guide for Ohio and Indiana is located at http://www.btny.purdue.edu/Pubs/WS/WS-16/WS-16.pdf.
There are many workshops in December, January and February where producers can interact with weed specialists.
"It is important for farmers to attend these workshops, because in the middle of the season they will have to make decisions on a daily basis," Johnson said. "This is one way for them to stay informed and prepared for the upcoming season."
If farmers notice an excessive weed problem, Johnson suggested they immediately contact a local Extension educator or chemical dealer to help with identification and control issues.
Johnson will speak about weed management issues at the Michiana Crop Conference on Monday (Nov. 30) in Shipshewana, Ind. A downloadable brochure and registration form is located at http://www.ag.purdue.edu/agry/dtc/Pages/default.aspx