0521WeedIDdbsr.cfm 0521WeedIDdbsr.cfm Weed ID important when selecting, treating weeds
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Weed ID important when selecting, treating weeds


It is essential to treat weeds to reduce the competition to desired plants in a field or pasture, according to Jill Scheidt, agronomy specialist with University of Missouri Extension in Barton County.

“When weeds are present, they are competing for nutrients, sunlight, air and moisture,” Scheidt said.

However, in order to have success, correctly identifying weeds in a pasture is important.

“Identifying a weed incorrectly can lead to applying the wrong treatment,” Scheidt said.

The most successful way to kill a weed is to treat for it while it is in a young stage of growth.

According to Scheidt, most weeds are hard to control once they have reached over four inches in height or diameter, so treating for weeds during the early stages of growth is pertinent.

Weed identification

University of Missouri Extension has many helpful resources to help producers correctly identify weeds and learn about growth stages and the most effective method for control.

The website http://weedID.missouri.edu contains about 350 different plant species that could be encountered as a weed of field and horticultural crops, pastures, lawns, gardens, and noncrop or aquatic areas in Missouri and surrounding states, said Kevin Bradley, MU Extension weed scientist.

Users choose either “broadleaf” or “grass and grass-like” and then narrow the list of suspects by selecting from among more than a dozen characteristics such as habitat, life cycle, leaf type and root system.

For more obscure characteristics like the presence of ligules and auricles, helpful illustrations appear when users keep the mouse pointer over the drop-down box.

New weed app

University of Missouri Extension has released a free app for iPhones, iPads and Android devices to help people identify weeds in the field, lawn or garden.

The app, called ID Weeds, has information on more than 400 plant species that could be encountered as weeds in crop fields, pastures, lawns, gardens or aquatic areas in Missouri and surrounding states. ID Weeds lets users narrow the list of suspects with a series of drop-down boxes for various plant characteristics.

If a user is not familiar with technical terms such as “ligules” or “spatulate,” they can click on “what’s this” to see an illustration.

“Seems like most people have a cell phone these days, so this app can aid producers with quick information,” Scheidt said.

Download iPhone and other iOS devices at itunes.apple.com/app/id-weeds/id559906313. For Android devices, search for “ID Weeds” at play.google.com/store.

Online publication

The University of Missouri Extension has many helpful guides on herbicides and control methods for weed control.

One document, “MUPastureWeedBrush.PDF” lists weed names, control methods, mixtures and correct timing herbicide application. This link can also be found on the Cedar County Extension website or by going to http://extension.missouri.edu and typing in “Pasture Weed and Brush Control.”

“This guide is quick and easy to follow, it also provides efficacy ratings on herbicides,” Scheidt said.

Local Extension offices can aid producers with printed information and tips on how to navigate through the MU Extension website.

Date: 6/17/2013



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