No. 02/April 06, 2001|
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|IN THIS ISSUE:|
|Resources on the Web|
Included in this issue of the Bulletin are "directions" to just a few Web sites that might provide valuable references throughout the year.
|Visit the IPM Web Site for Additional Information|
The University of Illinois IPM Web site (http://www.ipm.uiuc.edu/) is the repository for a lot of information related to management of insects, weeds, and plant diseases. At the IPM Web site, you can have access to many educational materials, including publications and video clips. You also can check out information by category.
|2001 Corn and Soybean Classic Presentations on the Web|
The presentations from the January 2001 Classic meetings were recorded to make them available to people who were not able to attend. Information Technology and Communication Services staff in the College of ACES taped all 10 presentations at the DeKalb meeting and synchronized the audio with the Power Point slides for presentation on the Web. You can listen to and watch these presentations at the Department of Crop Sciences Web site, http://www.cropsci.uiuc.edu/.
|Excellent Photos of the Soybean Aphid|
The first step in proper management of an insect pest is accurate identification. To help with this task, this Web site (http://www.inhs.uiuc.edu/cbd/aphid/index.html) includes some excellent photographs of wingless and winged soybean aphids, nymphs and adults, and eggs on Rhamnus.
|Some Web Resources Regarding Ag Biotechnology|
This article lists some Web sites that you might find useful for background information and issues-focused reporting about biotechnology.
|Just the Beginning for Alfalfa Weevils|
The onset of alfalfa weevil activity is off to a slower start this spring than it has been the past couple of years. Observations from the field indicate that alfalfa weevil eggs have just begun to hatch and initial signs of injury are apparent. This article discusses scouting alfalfa fields for alfalfa weevils. As temperatures warm up this week and next, expect alfalfa weevil activity to increase rather dramatically.
|Searching for Overwintering Corn Borers|
In issue no. 1 of the Bulletin (March 16, 2001), we cursorily addressed the effects of winter weather on European and southwestern corn borers. This time we offer visual evidence.
This article discusses how to distinguish between apparently healthy and apparently unhealthy or obviously dead southwestern corn borer larvae, and how to look for corn borer larvae on your own.
|First Report of Captures of Black Cutworm Moths|
The first captures of black cutworm moths in Illinois for 2001 have been reported.
|Seed and Seedling Rot Diseases of Corn and Soybeans|
As plans develop for planting corn and soybeans in April and May, it is be beneficial to consider the first wave of diseases that may attack: seed rots and seedling diseases. These diseases can kill seeds and seedlings, reduce plant stands, and significantly reduce yields. This article will briefly cover some key points on the pathogens that cause these diseases, conditions favoring these diseases, and options for management.
|Equation Corrections to Issue No. 1|
Two errors were made during the editing of equations that appeared in the article "A Roundup of Glyphosates--What Are the Differences?" in issue no. 1. The correct equations are provided here.
|Corn and Soybean Herbicide Premixes|
Corn and soybean herbicide premixes are (to say the least) numerous and can be confusing with respect to what active ingredients are contained in a given premix as well as the amount of active ingredient applied at a given rate. This article provided tables that list most of the commercially available corn and soybean herbicide premixes.
|Is Herbicide Carryover a Concern for 2001?|
The number of carryover problems that occurred during the 2000 growing season has raised the question regarding what the potential is for herbicide carryover during the 2001 growing season.
Herbicide carryover is a function of four properties: (1) the herbicide's ability to persist in the soil, (2) the amount of rainfall or soil moisture available for degradation, (3) soil temperature, and (4) soil pH. This article examines the impact of each these factors.
|Knockdown Decisions for 2001|
Winter annual and early summer annual weeds can cause significant problems, especially when field conditions are not conducive for a timely burndown herbicide application prior to no-till corn or soybean planting. It is not atypical to deal with winter annual weeds ranging from a few inches to more than a foot in height when burndown herbicide applications are made. Proper timing of a burndown herbicide application can often reduce problems later in the season.
|Weed Control in Small Grains|
The wheat crop across much of Illinois appears to have made it through the winter reasonably well. While some concerns about the crop still exist, weed-control strategies may soon be considered by producers. The vast majority of herbicide options for weed control in wheat are for control of broadleaf species. Wild garlic, especially in the southern portion of Illinois, is an important nonbroadleaf species that can result in significant economic losses if left uncontrolled.
Extension Center educators, Unit educators, and Unit assistants in northern, west-central, east-central, and southern Illinois prepare regional reports to provide more localized insight into pest situations and crop conditions in Illinois. The reports will keep you up to date on situations in field and forage crops as they develop throughout the season.
This week's issue includes reports from east-central, northern, southern, and west-central Illinois.