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

Corn Rootworm Damage Reports from 1st Year Corn

By WCM Staff on 7/20/2006 7:47 PM

Reports of corn rootworm larval damage on first year corn have been received over the last two weeks. A report of a field corn field (following soybeans) with extensive root damage (2 to 3 nodes of roots pruned) near LaPrarie, WI. Also in Rock County, a report of similar damage in a first year seed corn field following soybeans near Evansville, WI.

Soybean Aphids Remain Low in WI, Continue Scouting to Detect Change

By WCM Staff on 7/20/2006 7:26 PM

Soybean aphid reports from UW Extension county agents, crop consultants, industry reports, and our UW Entomology field studies remain below threshold for the most part as of Friday July 21st. However, Greg Andrews, UW-Extension Pierce County Agriculture Agent (northwest WI) reported a soybean field averaging 250-500 aphids per plant.

Potential for Two-Spotted Spider Mite Outbreaks Exists

By WCM Staff on 7/20/2006 7:21 PM

In the July 13th issue, I reported about Two-Spotted Spider Mite (TSM) in Jefferson County and recommended scouting for spider mites. This article is to keep that reminder in the forefront.

Corn Rootworm Adults: Beetle Counts and Silk Clipping

By WCM Staff on 7/20/2006 7:02 PM

While below ground corn root feeding impact from corn rootworm is nearing completion, it’s time to turn scouting attention to the above ground corn plant portions. Whole plant adult counts during August are used to make recommendations for rootworm management decisions in continuous corn in 2007.

Two-spotted Spider Mite detected in Jefferson County

By WCM Staff on 7/13/2006 5:08 PM

Inspect Fields in Dry Counties -- On Friday, July 7th, Tim Bender, (UW Extension Crops/Soils Agent, Jefferson County) reported Two-spotted spider mite (TSM) from his soybean rust sentinel scouting field location (southern WI).

Soybean Aphid: USDA PIPE Website and Mid-July Report

By WCM Staff on 7/13/2006 5:02 PM

A new USDA website is up and running with weekly soybean aphid reports from multiple locations within WI and the U.S. The Pest Information Platform for Extension and Education (PIPE) http://www.sbrusa.net/ began with sentinel plot monitoring throughout the U.S. for soybean rust. In 2006, PIPE has expanded with a pilot soybean aphid reporting year.

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.

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.

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.