Wisconsin Crop Manager newsletter

Author:	WCM Staff	Created:	4/21/2006 12:13 PM
Whats bugging you. Articles concerning insects on field crops in Wisconsin

Alfalfa: Continue Potato Leafhopper Scouting

By WCM Staff on 6/29/2006 12:00 AM

Adults and nymphs are present in fields now and should be monitored for population increase on 2nd crop. Potato leafhopper populations can build quickly, particularly as temperatures increase.

Alfalfa Stubble Spray? Insecticide REI, PHI, Residual and … Integrated Pest Management

By WCM Staff on 6/29/2006 12:00 AM

Every other week during the growing season, UW-Extension agriculture county agents and UW-Madison field and forage crop specialists have an opportunity to meet via teleconference and share information on insect, weed and plant pathogen pests, agronomy updates, and crop conditions throughout the state.

Soybean Aphid Watch 2006, June 28

By WCM Staff on 6/29/2006 12:00 AM

Soybean aphids have been detected in low densities and patchy distribution for the month of June in Wisconsin and neighboring states.

European Corn Borer Moth Flights Approaching Peak First Generation Field Scouting Resources

By WCM Staff on 6/15/2006 4:46 PM

Information on European corn borer, field scouting and economic threshold worksheets, and degree-days.

What is that insect? – Red Turnip Beetle

By WCM Staff on 6/8/2006 4:18 PM

An uncommon beetle for field crops has been observed emerging from sandy soils over the last week or so. I received one call on this beetle emerging in very large numbers from sandy soil in northwest Wisconsin in an alfalfa field. Phil Pellitteri, UW Department of Entomology Insect Diagnostic Lab received similar calls and quickly identified the beetle as Red Turnip Beetle. This is not a pest of alfalfa, and will not cause economic feeding injury to alfalfa to 2nd crop regrowth.

Alfalfa Weevil Alert: Watch 2nd Crop Alfalfa Regrowth

By WCM Staff on 6/8/2006 4:05 PM

With increased temperatures over the last week, late instar alfalfa weevil development is accelerating more quickly than earlier instars. Additionally, we have received a couple of reports of heavy alfalfa weevil larval populations from southern Wisconsin. While not a common problem in most years to 2nd crop regrowth, and alfalfa weevils are now entering late instars and will soon pupate, it is recommended to scout 2nd crop regrowth for late instar alfalfa weevil, even if previous first crop scouting assessment did not present a treatment threshold situation.

Field Note: First Generation Armyworm

By WCM Staff on 6/8/2006 4:02 PM

First generation armyworm has been detected in Dodge County in a report provided by Matt Hanson, UW-Extension Dodge County Crops and Soils Agent. In this instance the field history was a corn field planted to winter rye last fall after corn silage harvest. Rye was grazed off this spring.

Black cutworm activity approaching in Corn

By WCM Staff on 5/17/2006 6:35 PM

Watching the WI DATCP Wisconsin Pest Bulletin black light trap network, we know that black cutworm eggs are being laid and larvae have started to hatch near Beloit and La Crosse.

Corn Seed Treatment for Sandhill Crane Repellency – Know your Labels

By WCM Staff on 4/27/2006 10:17 PM

This spring 2006 Wisconsin, Minnesota and Michigan received temporary approval by US EPA under a Section 18 label for use of the non-lethal bird repellent, AvitecTM. This repellent can be used as a liquid or dry powder planter box corn seed treatment for field and sweet corn in WI, MN, and MI to protect planted corn seed from Sandhill Crane herbivory.

Early Season Insect Calendar: Seed Corn Maggot

By WCM Staff on 4/21/2006 1:14 PM

Although occasional and site-specific, one early season field crop insect pest to be aware of is the seedcorn maggot. Although seedcorn maggot can be a threat to corn, damage is not usually as severe in corn as when found on soybeans, peas and succulent beans.

2005 Bean Pod Mottle Virus Survey Results

By WCM Staff on 4/6/2006 10:16 AM

In spring overwintered bean leaf beetles become active in cultivated (alfalfa) and wild (showy tick trefoil) legumes before soybeans are available. Early planted soybeans are at greater risk of bean leaf beetle feeding and bean pod mottle virus transmission.

Sandhill Cranes and Corn: AvitecTM Corn Seed Treatment Approved for 2006

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™.

Western Corn Rootworm (“Soybean”) Variant Survey 2005

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.

Corn Rootworm Product Efficacy Trials, UW-Madison Entomology 2003-2005

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.