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Sandhill Cranes and Corn: AvitecTM Corn Seed Treatment Approved for 2006
Wisconsin Crop Manager Insects and Mites By WCM Staff on 3/23/2006 5:38 PM
The WI DATCP, International Crane Foundation (ICF), and UW Entomology Department have been notified by the United States Environmental Protection Agency (EPA) that temporary approval (Section 18 approval effective March 13, 2006 - August 15, 2006) has been given for the use of the non-lethal bird repellant, Avitec™.
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Western Corn Rootworm (“Soybean”) Variant Survey 2005
Wisconsin Crop Manager Insects and Mites By WCM Staff on 3/9/2006 6:00 AM
Risk management pertaining to corn rootworm is becoming more complicated regionally as variant strains of both northern and western corn rootworms have adapted behaviors to succeed in rotated corn.
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Corn Rootworm Product Efficacy Trials, UW-Madison Entomology 2003-2005
Wisconsin Crop Manager Insects and Mites By WCM Staff on 1/19/2006 3:00 AM
The impact of corn rootworm larval feeding on corn is evaluated each growing season in replicated small plot trials at the Arlington Agricultural Research Station using the Iowa State University 0 to 3 Node-Injury scale (Oleson et al. 2005). The current article summarizes root-rating results for three years, 2003-2005.
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The Relationship Between Corn Grain and Forage Yield: An Update
Wisconsin Crop Manager Crops By WCM Staff on 8/24/2005 9:00 PM
Understanding the relationship between corn grain and forage yield is important to dairymen and grain farmers who often contract with each other for corn silage production. Recently, the grain versus forage relationship has set government Loan Deficiency (LDP) Payments to farmers for corn silage acres.
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Late Summer Cutting Management of Alfalfa
Wisconsin Crop Manager Crops By WCM Staff on 8/24/2005 8:00 PM
The difficult alfalfa harvesting conditions early this summer have meant that many farmers are off schedule for harvesting alfalfa. This raises the question of best management for alfalfa harvest as the end of summer approaches.
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Getting the Most from Drought Stressed Forages
Wisconsin Crop Manager Crops By WCM Staff on 8/4/2005 9:00 PM
The questions we should be considering is how to maximize that growth for good hay, silage or pasture production. Below we will consider the major crops and what actions should be taken.
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European Corn Borer Summer Moth Flights Have Peaked, Prepare for 2nd Generation
Wisconsin Crop Manager Insects and Mites By WCM Staff on 8/4/2005 11:43 AM
For those who may not have caught last week’s (July 29) issue of the WI DATCP Wisconsin Pest Bulletin, please be aware that emergence of the summer flight of European corn borer moths has peaked in parts of Wisconsin.
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Adult Corn Rootworm Sampling and Economic Thresholds in Continuous Corn
Wisconsin Crop Manager Insects and Mites By WCM Staff on 8/4/2005 11:29 AM
Damage to corn roots by corn rootworm larvae in continuous corn fields during the 2006 growing season will depend on adult corn rootworm beetle populations in corn fields over the next 5 to 6 weeks. The only way to determine whether a field is likely to have an economic rootworm infestation next year is to scout for adults this August-September.
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Advanced Armyworm and Outbreak Pockets in Western Wisconsin
Wisconsin Crop Manager Insects and Mites By WCM Staff on 7/28/2005 12:31 PM
Corn fields in western and west central Wisconsin are exhibiting advanced armyworm larval stages and extreme corn leaf feeding to the midrib. Some of the reports, as detailed below, are related to grassy weed presence and/or later than optimal grassy weed control. However, more extensive field areas are being defoliated due to heavy populations, independent of weed management issues.
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Spider Mites – Threshold Overview, Effects of Rain
Wisconsin Crop Manager Insects and Mites By WCM Staff on 7/28/2005 12:08 PM
Spider mites continue to be present on soybeans in Wisconsin. The main questions coming in by phone and at field days over the last week are “What is the threshold for two-spotted spider mite?” and “How will the recent strong storms affect mite populations?”.
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Critical to Watch Soybean Aphids as Temperatures Cool
Wisconsin Crop Manager Insects and Mites By WCM Staff on 7/28/2005 11:22 AM
As reported in the July 21st issue of Wisconsin Crop Manager, soybean aphids continue to warrant close monitoring. By mid-July fields exceeded threshold in many southern WI counties and received timely insecticide application based on populations in excess of 250 aphids per plant average.
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Research Brief: 0 to 3 Node-Injury Scale for Corn Rootworm Rating
Wisconsin Crop Manager Insects and Mites By WCM Staff on 7/7/2005 2:03 PM
A recent article published in the February 2005 issue of Journal of Economic Entomology titled “Node-Injury Scale to Evaluate Root Injury by Corn Rootworms (Coleoptera: Chrysomelidae)” (Oleson et al. 2005) provides new and improved guidance for the annual corn root rating task.
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Time Approaching to Evaluate Corn Roots for Injury by Corn Rootworms
Wisconsin Crop Manager Insects and Mites By WCM Staff on 7/7/2005 12:57 PM
Over the next couple of weeks of July, we enter the crop season window during which to evaluate corn root injury by corn rootworms. We are planning to dig roots, soak and then wash the soil away with a high pressure hose stream, and quantify root injury in our UW Madison Entomology research trials, insecticide efficacy program, and on-farm studies between the dates of July 18th and July 25th.
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Soybean Aphids and High Temperatures
Wisconsin Crop Manager Insects and Mites By WCM Staff on 6/23/2005 12:44 PM
Much of Wisconsin is forecasted to experience high temperatures. As we are all in the field experiencing temperatures in the upper 80s and approaching 90s or higher heat index ratings, how will this affect population growth of the soybean aphid?
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Guest Article Feature: Planning for the 2005 Soybean Aphid Population
Wisconsin Crop Manager Insects and Mites By WCM Staff on 5/26/2005 1:30 PM
With soybean planting well underway for 2005 there is a lot of concern about potential pest problems, both rust and aphids this year. Following a year in which the soybean aphid was widely distributed in the Midwest but rarely common enough to generate concern, the question is what about 2005?
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Field Reports: Dingy Cutworm in Corn, Look for Black Cutworm Cutting
Wisconsin Crop Manager Insects and Mites By WCM Staff on 5/26/2005 1:21 PM
Several reports have come in this week on Dingy cutworm larvae in seedling corn fields. Several reports have come in this week on Dingy cutworm larvae in seedling corn fields. These corn fields are just emerging, or up to the first true leaf stage. Common to all these consultant calls is that the fields of concern are of sandy soil type.
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Change in Yield and Quality of Alfalfa
Wisconsin Crop Manager Crops By WCM Staff on 5/25/2005 9:00 PM
Many growers are asking about the tradeoffs in yield and quality as they enter quality pricing contracts for hay or haylage. The situation is that premiums are paid for quality but some of the higher price for increased forage quality is offset by lower yields of fields cut earlier for the higher quality.
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