NDSU Crop and Pest Report
Weeds


ISSUE 11  July 10, 2003

NOXIOUS WEED PUBLICATION LAUNCHED

The first issue of North Dakota Noxious Weed Quarterly is now available from the North Dakota Department of Agriculture (NDDA). The newsletter is aimed at county and city weed boards and weed control officers. The purpose of this newsletter is threefold. It will help keep weed boards and weed control officials up to date on the various weed control programs and initiatives offered by NDDA and other agencies; it will provide information on weed management theories and techniques, and it will serve as a forum for interested people to share their ideas and knowledge.

Subjects covered in the first issue include tips for collecting leafy spurge-eating flea beetles, a review of 2003 legislation affecting weed control, eligibility for saltcedar control funds, mapping weeds and two recent invasive weeds - black henbane and yellow toadflax. The articles were prepared by NDDA noxious weed control, as well as researchers and officials from North Dakota State University, USDA Agricultural Research Service and the Wyoming Biological Control Steering Committee.

 

2003 LEGISLATION AFFECTS WEED CONTROL

Five bills passed by the 2003 ND Legislature and signed by the governor are of interest to persons in noxious weed control.

Senate Bill 2082 amends the Section 4-35 of the ND Century Code which classifies county weeds boards and their employees as "public applicators" for the purpose of applying pesticides. Public applicators must follow the same requirements as commercial applicators when applying pesticides.

Seneate Bill 2124 removes the sunset on a "zero" tolerance for yellow starthistle in seed tolerances.

Senate Bill 2206 removes the sunset on the seed tolerance for restricted weed seeds in excess of 25 seeds/lb. It is unlawful to sell crop seed if it contains prohibited noxious weed seeds. This means that no seed can be sold if the seed content for listed, restricted weeds exceeds 25 seeds/lb and exceeds zero/lb prohibited noxious weeds.

Senate Bill 2319 appropriates $250,000 for surveying and controlling saltcedar in ND.

House Bill 1024 allows county commissioners to consolidate selected county mill levies to be used their discretion. County residents can vote to opt out of the consolidation of the mill levies by petitioning the county commissioners for a vote. This does not relieve the counties from certifying three mills dedicated for weed control to be eligible for state funding for landowner assistance programs.

 

LIST-SERVE KEEPS LAND MANGERS IN TOUCH

The ndda-weeds@state.nd.us  email list-serve was developed to allow land managers to easily communicate with other land managers in or working in ND. Contact Dean Cline to subscribe: dcline@state.nd.us .

 

WEED POSTERS AVAILABLE

Color posters of the 12 ND noxious weeds are now available and are being mailed out to all county and city weed boards as well as state and federal agencies with the land management responsibilities in the state. Contact the NDOA for more information.

Jeff Olson
Plant Industries Program manager
NDDOA

 

KNOW THE RULES ABOUT MOWING FOR WEED CONTROL

Mowing is a legitimate method of weed control for organic growers, CRP contract holders and others, if certain requirements are met. To meet the letter of the law in preventing the spread of weeds, producers must cut or mow weeds before weeds start to bloom. Mowing must be done before any color can be seed in the flower bud from the flower petals. If you can see the color of the flower petals, there will be viable seed production, and it is too late for mowing to be an acceptable method of weed control. Since mowing does not kill an established perennial plant, it will continue to send up more flowering stems throughout the rest of the growing season.

Ken Eraas
Weed Specialist
NDDOA

 

OVERDRIVE HERBICIDE REGISTERED FOR PASTURE AND RANGELAND

EPA has approved registration for Overdrive in late March, 2003 and the North Dakota state registration was granted on May 16, 2003. Overdrive is currently available for sale in both North and South Dakota. Overdrive is equivalent to Distinct except Overdrive is labeled for use in pasture and rangeland and Distinct is labeled for use in corn. Pricing should be very similar for both products and there should be no significant price advantage between Overdrive and Distinct. Contact a BASF rep or consult a label for additional information.

 

PURDUE SCIENTISTS INVESTIGATE BORED TUNNELING IN WATERHEMP AND RAGWEED

Purdue University Extension weed scientists and entomologists are studying the correlation between glyphosate efficacy and borer tunneling in waterhemp and giant ragweed species in Indiana. There have been concerns recently in some parts of the Midwest that borer damage could hamper the translocation of some contact herbicides. In most cases of weed escapes, the scientists have observed tunneling in the weeds where the escapes occurred, but primarily in the larger plants.

Richard Zollinger
NDSU Extension Weed Specialist
rzolling@ndsuext.nodak.edu


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