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Prepare to Monitor Alfalfa Stands for Alfalfa Weevil Larvae
Wisconsin Crop Manager Insects and Mites By WCM Staff on 4/28/2005 11:10 AM
Alfalfa weevils overwinter as adults, becoming active with the first warm days of spring in which they migrate from plant debris, woodlots, ditchbanks, etc. into alfalfa stands to lay eggs. Most eggs are deposited in stems of the growing alfalfa. By using degree days (accumulated above a base 48F), growers and crop advisors can monitor fields for alfalfa weevil activity.
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Stewart’s Wilt outlook in WI corn for 2005 – and ID tips on springtail versus corn flea beetle
Wisconsin Crop Manager Insects and Mites By WCM Staff on 4/21/2005 4:01 PM
Corn flea beetle can vector Stewart’s bacterial wilt of corn, and is of concern in susceptible sweet corn varieties and susceptible dent corn inbred seed production fields if 1) corn flea beetles have a high overwintering survival rate 2) Stewart’s wilt bacteria is available for the corn flea beetle to pick up and spread.
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Regulatory Brief: Sandhill CraneHerbivory on Young Corn Plants
Wisconsin Crop Manager Insects and Mites By WCM Staff on 4/14/2005 3:07 PM
Although not in the insect management category, I have talked with several consultants and growers who have asked about the status of corn seed chemical treatment options that may be registered in the near term to deter greater sandhill crane (Grus Canadensis tabida) feeding on field corn between the planting and early seedling stages.
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Research Brief: Soybean Aphid and Soil Potassium Availability
Wisconsin Crop Manager Insects and Mites By WCM Staff on 4/7/2005 3:13 PM
Results of research conducted by University of Wisconsin, Madison entomologists and a soil scientist on the “Effect of soil potassium availability on soybean aphid population dynamics and soybean yield” were published in the February 2005 issue of the Journal of Economic Entomology.
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Bean Pod Mottle Virus – A No-Show in Wisconsin Soybeans in 2004
Wisconsin Crop Manager Insects and Mites By WCM Staff on 1/17/2005 5:28 PM
The late season 2004 BPMV analyses are complete and the season ended as it began, with minimal detection of BPMV in bean leaf beetles collected in spring alfalfa fields followed by no positive detections of BPMV in late season soybean plants throughout the state.
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Negotiating the Value of Immature Corn Silage
Wisconsin Crop Manager Crops By WCM Staff on 9/8/2004 9:00 PM
Arriving at a fair and equitable price for corn silage is difficult due to the number of factors involved that are dynamic and biologically variable. Some factors include production costs, grain price, harvesting costs, costs of handling, hauling and storage, grain drying costs, fertility value of stover, and forage quality (especially starch content and neutral detergent fiber digestibility-NDFD).
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Grazing Soybeans
Wisconsin Crop Manager Crops By WCM Staff on 8/25/2004 7:00 PM
Although there isn't much data on grazing soybeans, beans can be high in quality and provide good grazing. Recommendations are listed.
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Rehydration of Corn Forage Standing in the Field
Wisconsin Crop Manager Crops By WCM Staff on 1/14/2004 11:00 PM
Many fields in Wisconsin had uneven crop development during the 2003 growing season. We were interested in the forage moisture differences of corn in knoll and swale areas of the field.
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Fall and Spring Forage Yield and Quality from Fall-Seeded Cereal Crops
Wisconsin Crop Manager Crops By WCM Staff on 9/3/2003 7:00 PM
Cereal crops such as oats, barley, triticale, wheat, and rye may be a source of emergency fall forage and/or a source of forage the following spring. The choice of which specie to plant depends on the importance or need for forage in the fall as opposed to forage in the spring.
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Planting Corn For Silage Following Winter-Killed Alfalfa
Wisconsin Crop Manager Crops By WCM Staff on 4/23/2003 9:00 PM
The following is a summary of planting date trials conducted at Arlington, WI. The objective of these trials is to measure the impact of planting date on corn forage yield and quality.
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Follow-up On Harvesting Corn Silage From Highly Erodible Land
Wisconsin Crop Manager Crops By WCM Staff on 6/12/2002 10:00 PM
In the 25 April 2002 issue of the Wisconsin Crop Manager, I suggested one way to make T requirements is to raise the cutter bar on the corn silage chopper. This strategy lowers silage yield, but a trade-off exists whereby silage quality is increased.
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Managing Corn Silage on Highly Erodible Land
Wisconsin Crop Manager Crops By WCM Staff on 4/24/2002 7:00 PM
By correlating studies that estimate percent ground cover from corn residue mass with cutting height studies conducted in Wisconsin we might be able to derive some general guidelines for managing corn silage on highly erodible land.
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Uneven Maturity at Corn Harvest – Handling Silage and Grain
Wisconsin Crop Manager Crops By WCM Staff on 9/5/2001 10:00 PM
The corn production season of 2001 has been extremely "variable." This year’s variability is more within fields than between fields and the harvest season will present some special handling problems.
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Alfalfa Management Under Moisture Stress
Wisconsin Crop Manager Crops By WCM Staff on 7/18/2001 10:00 PM
Moisture swings during growing season 2001 have been significant to say the least. Although the current round of dry weather may not rival the memorable droughts of prior years, it is raising management concerns.
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Milk2000: A New Way to Estimate Corn Hybrid Silage Performance
Wisconsin Crop Manager Crops By WCM Staff on 12/13/2000 11:00 PM
Because the cows maintenance energy requirements were partitioned against the total diet in MILK2000 rather than against only corn silage as was done in MILK95, there was a base increase in our new estimate of milk per ton which was of equal value across all samples that did not influence ranking of hybrids.
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Predicting Corn Silage Harvest Dates
Wisconsin Crop Manager Crops By WCM Staff on 8/23/2000 6:00 PM
One of the more difficult managment decisions when producing corn silage is properly timing harvest. Corn silage that is too wet will yield less, result in silo seepage and produce a sour tasting silage resulting in lower intake by livestock. If corn silage is too dry then yield is often reduced, heat damage and mold more easily develops in the silo because fermentation is inadequate, and the silage has lower protein, digestibility and the vitamins A and E.
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Calculating Grain and Silage Yields for Loan Deficiency Payments
Wisconsin Crop Manager Crops By WCM Staff on 10/13/1999 10:00 PM
Much progress has been made in breeding adapted high yielding hybrids that are more resistant to biotic and abiotic stresses. Does the old relationship between grain and silage yield still hold?
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