Depending upon the herbicide, injury can occur after a pre-emergence application when corn is germinating in cool, wet soils. This year, if corn was planted in mid-April then you may observe some injury. However, it is important to remember that other environmental factors can mimic herbicide injury symptoms such as corn emerging in crusted or compacted soil. For this spring, WCWS has a re-designed online diagnostic tool, available at http://wcws.cals.wisc.edu/herbicide-injury-diagnostic-tool or from the main page, go to ‘Resources’ and then to ‘Tools’. The diagnostic tool asks three basic questions 1) When do injury symptoms appear? 2) Are both broadleaves and grasses affected or just one group? and 3) What are the symptoms and where do they occur? The original web-based tool was developed by Tim Trower and Chris Boerboom to accompany a handy two-page guide. The following changes were made to the new version:
Each page shows your previous answers.
A ‘Start over’ button is located at the bottom of each page.
Simplified guides to symptoms that mimic herbicide injury during and after emergence are included on each mode-of-action page (Fig. 2).
Photo galleries for both corn and soybean injury symptoms are located on the same page (Fig. 3).
Figure 1. Herbicide site-of-action groups, chemical families, active ingredients, and product examples for the seedling shoot growth inhibitor mode-of-action. Specific sections of the larger TakeAction chart are on each mode-of-action page.
Figure 2. Mimics of herbicide injury to corn during or at emergence.
Figure 3. Example of a photo gallery for corn and soybean herbicide injury symptoms.
For pre-emergence applications in corn, the seedling shoot growth inhibitors, particularly the chloroacetamides, may injure seedlings when soils are cool and wet. Injury will not always be apparent aboveground. For example, corn plants with seedling root growth inhibitor damage will display clubbed root tips and grasses will be more affected than broadleaves. To get an idea of injury risk, check out the herbicide tables in “Pest Management in Wisconsin Field Crops” available in pdf and print formats at Cooperative Extension’s Learning Store.
Figure 1. A) Common lambsquarters; a soil sampler, one inch diameter, is in the foreground B) Horseweed (marestail); C) Giant ragweed, with seed capsule attached; D) Giant ragweed seedlings.
The fields may look cold, wet, and dormant this week but weeds were germinating in some fields in Janesville and Arlington last week. On April 17 at Janesville, common lambsquarters, giant ragweed, and horseweed were emerging (Fig. 1A-D). At Arlington in a plowed area, velvetleaf was emerging (Fig. 2). If you are leasing new land this year or want to get a head start on weed management, then scouting for weeds at the seedling stage before tillage can be a good way to assess density, the number of weeds in a given area, and for which weed species will likely be an issue around planting time. The Weedometer, developed by University of Wisconsin, can predict when weed species will likely be emerging for your location at http://weedecology.wisc.edu/weedometer/ . A guide to identifying the “Common Weed Seedlings of the North Central States” is available in pdf and print formats at Cooperative Extension’s Learning Store, or on the WCWS Weed info page.
What are the economic costs of cover crops? What are the environmental and economic benefits? How do the nutrients from cover crops cycle through the soil? What is The New York Times saying about cover crops? All of this information and much more can be found on the UW Cooperative Extension Cover Crop Workgroup website, where UWEX personnel across Extension programs and disciplines provide resources regarding cover crops which will be frequently updated.
University of Extension Rusk and Taylor counties will be hosting Annie’s Project Financial Management workshops on February 25 and March 4. For more information, read Sandy Stuttgen’s news release below.
Contact: Sandy Stuttgen, 715-748-3327, firstname.lastname@example.org,
Annie’s Project Financial Management Workshop scheduled for February and March
Medford, Wis. – University of Wisconsin-Extension Rusk and Taylor Counties are hosting a two day Annie’s Project on Farm Financial Management. The workshop will be held on Wednesday, Feb. 25 and Wednesday, March 4 from 10 a.m. to 3 p.m. at the Jump River Community Center in Jump River, Wisconsin.
This workshop series is for farm women who are interested in learning or improving their farm financial management, which is part of the fabric of farm life. The series will be inter-active between speakers and participants with in-class exercises.
Introduction to Financial Management
Records and Recordkeeping Systems
Filing Important Family Papers
Management Reports including the Balance Sheet and Income Statement
Analysis and Interpretation of Financial Statements
Benchmarking of Financial Position and Performance
Decision Making Tools including Budgets
The cost of the program is $40 which includes materials and lunch both days. Brochures and registration information are available by contacting UW-Extension Taylor County office at 715-748-3327 or http://taylor.uwex.edu/ .
Annie’s project is an opportunity for farm women to learn about farm management skills by providing resources and information to improve farming operations. Class sizes are small which allows for opportunities to network with other farm women in similar situations.
Wisconsin Farm Center, another resource from the state of Wisconsin and the Department of Agriculture, Trade and Consumer Protection, releases quarterly newsletters with a wide array of topics. If you are too busy during the growing season, winter may be a great time to catch up on Farm Center newsletters. Another great way to stay up-to-date is to subscribe to their email newsletter.