Weed Control Guide for Field Crops

2004 Weed Control Guide for Field Crops

MSU Extension Bulletin E-43411

Printed Bulletin Revised November 10, 2004

By Christy L. Sprague, James J. Kells, Kathrin Schirmacher

Corn

Cultural Control of Weeds	5A -- Chemical Weed Control in Fry Edible Beans: Preplant Incorporated Soil Applied Postemergence
Cultivation	5B -- Preharvest Treatments in Dry Edible Beans
Chemical Control of Weeds	5C -- Weed Responses to Herbicides in Try Edible Beans
Herbicide Formulation and Additives	6A -- Chemical Weed Control in Potatoes: Preplant Followed by Delayed Preemergence Delayed Preemergence Postemergence
Herbicide Application	6B --Vine Desiccation in Potatoes
Pesticides and the Environment	6C -- Weed Response to Herbicides in Potatoes
Restricted Use of Pesticides	7A -- Chemical Weed Control in Sugar Beets: Preplant Preemergence Micro-Rate Postemergence Timing Micro-Rate Applications Using Growing Degree Days (GDD) Early Postemergence Post Emergence
Herbicide Resistance in Weeds	7B -- Weed Response to Herbicides in Sugar Beets
Herbicide Sites of Action	7C -- Guidelines for Velvetleaf Control with UpBeet
Table 1A — Chemical Weed Control in Corn: Soil Applied Postemergence-- All Tillage Systems	8-- Chemical Weed Control in Forage Sorghum
Table 1B -- Chemical Weed Control in Imidazolinone Resistant Corn (Clearfield Corn)	9 -- Weed Response to Herbicides in Forage Sorghum
Table 1C -- Chemical Weed Control in Liberty Resistant/Liberty Link Corn	10- Glyphosate Products Registered for Postemergence Application in Roundup Ready Crops
1D--Chemical Weed Control in Glyphosate Resistant Corn	11 -- Rainfree Period for Postemergence Application
1E -- Chemical Weed Control in No-Till Corn: Burndown Herbicides Legume Sod Quackgrass Sod	12 -- Herbicide Crop Rotation Restrictions
1F -- Plant Response to Burndown Herbicides in Sod	13 -- Toxicity, Solubility, Adsorptivity, and Persistence of Herbicides
1G -- Effectiveness of Herbicides for Burndown in Corn	14 -- Glossary of Chemical Names
1H -- Herbicide Premixes in Corn	15 -- Glossary of EPA Registration Numbers
1I -- Weed Response to Herbicides in Corn	Field Crop CAT Alerts
1J -- Weed and Crop Heights for Postemergence Herbicide Applications in Corn	WeedSOFT 2005
1K -- Delayed Herbicide Application in Corn	How to Submit a Sample to MSU diagnostic Services
1L -- Herbicide: Organophosphate Insecticide Compatibility Chart for Conventional and Clearfield Corn	Controlling Dandelion in No-Tillage Corn and Soybean
2A -- Chemical Weed Control in Soybeans: Preplant Incorporated Soil applied -- All Tillage Systems Postemergence for Broadleaf Weeds Postemergence Grass Control	Controlling White Campion in No-Tillage Systems
2B -- Weed Control in Glyphosate Resistant Soybeans	Controlling Horseweed (Marestail)
2C -- Weed Management in No-Till Soybeans: Effectiveness of Herbicides for No-Till Soybeans	Controlling Wild Carrot
2D -- Soybeans--Preharvest Application	Controlling Canada Thistle
2E -- Herbicide Premixes in Soybeans	Controlling Common Pokeweed
2F -- Weed Response to Herbicides in Soybeans	Controlling Hemp Dogbane
2G -- Maximum Broad Leaf Weed Heights for Postemergence Control in Soybeans	Pesticide Emergency Information
2H -- Suggested Additives for Postemergence Herbicide Applications in Soybeans
2I -- Additives for Postemergence Broadleaf Weed Control in Soybeans	Entire E-43411 .PDF file -- 1.07 megabytes
2J -- Application rates of Postemergence Grass Herbicides for control of Grass Species at various Heights
2K -- Labeled Tank-Mixes with Postemergence Grass Herbicides in Soybeans
2L -- Feed and Forage Restrictions for Soybean Herbicides
3A -- Chemical Weed Control in Small Grains: Wheat and Barley (Without Legumes) Figure 1 -- Wheat Growth Stages According to Freeke's Scale and Corresponding Herbicides
3B -- Harvest Restrictions for Small Grain Herbicides
3C -- Weed Responses to Herbicides in Small Grains
4A -- Chemical Weed Control in Forage Establishment: Alfalfa, Trefoil and Clover Birdsfoot Trefoil (only) Alphalfa (only)
4B -- Chemical Weed Control in Established Forages Alfalfa Birdsfoot Trefoil Grass Pasture Preharvest Application -- Alfalfa
4C -- Harvest Restrictions for Forage Legume Herbicides
4D -- Harvest Restrictions for Forage Grass Herbicides
4E -- Weed Response to Herbicides in Forage Legumes
4F -- Weed Response to Herbicides in Established Forage Grasses

IMPORTANT: READ THE FOLLOWING BEFORE USING

Rates are expressed in pounds of active ingredient (a.i.) per acre for the area actually sprayed; rates in formulation column are given as pounds or ligquid measure of product unless otherwise noted.
(NOTE: Commercial rates are expressed in pt or qt or gal or lb or oz).
Apply all agricultural chemicals in accordance with regulations and labels as to rates, timing and crops for which they may be used.
Rates recommended in this bulletin are for medium-textured soils with 3% organic matter.
Many herbicides may also be applied as granules or impregnated on dry fertilizer. With these application methods, uniform application of the herbicide is necessary for acceptable weed control.
For incorporated herbicides the recommended mixing depth is 1 to 2 inches.

This publication contains pesticide recommendations based on research and pesticide regulations. However, changes in pesticide regulations occur constantly. Some pesticides mentioned may no longer be available, and some uses may no longer be legal. If you have questions about the legality and/or registration status for using pesticides, contact your county MSU Extension office.

To protect yourself and others and the environment, always read the label before applying any pesticide.

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