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ISSUE 15  August 10, 2000



    Canada thistle is rapidly becoming North Dakota's most widespread noxious weed. At the present rate of infestation, Canada thistle will surpass leafy spurge in total acreage by 2002. The most recent data suggests it already infests more than 900,000 acres.

    The North Dakota Extension Service and Department of Agriculture has received numerous phone calls from landowners who are concerned with lack of Canada thistle control in neighboring cropland, pasture and CRP lands. State law requires every citizen to control the spread of noxious weeds on their lands. If noxious weeds are not properly controlled, complaints should be made to county or city weed boards.

    Canada thistle acreage in North Dakota is up 300 percent since 1992 with an average of 99,000 acres added every year. Despite its name, Canada thistle (Cirsium arvense), like many noxious weeds in the U.S., is native to Eurasia, and was probably introduced into this county by accident in the early 17th century. It has been declared a noxious weed in almost every state. It is one of the most widespread, tenacious and economically damaging weeds in the U.S. and Canada.

    Canada thistle principally reproduces by sending out shoots from lateral roots, and can readily regenerate from root fragments less than an inch in length. Canada thistle is a prolific seed-producer. A single plant can produce more than 5,000 seeds, which can remain viable in the soil for more than 20 years. Seed dispersal and human activities associated with crop production are the main methods of establishment in new areas. Canada thistle produces an abundance of seed carried by the wind with the aid of down. Some may remain in the seed heads and is distributed throughout the winter.

    Management techniques include hand-cutting, mowing, controlled burning, and herbicides. Due to its perennial nature, entire plants must be killed in order to prevent regrowth from rootstock. Research is underway into biological control of the weed.



    The ND Dept of Ag has ordered a crisis (Section 18) exemption on Roundup Ultra and Roundup Ultra RT, enabling North Dakota flax growers to control Canada thistle, perennial sowthistle and kochia in their fields. Wet weather was cited as the cause for the emergency condition and resulted in late flushes of Canada thistle and perennial sowthistle in addition to infestations of kochia. Since, flax may be harvested at least two weeks ahead of schedule, Roundup Ultra and Roundup Ultra RT must be applied immediately to allow a sufficient pre-harvest interval.

    The exemption allows a single ground or aerial application of Roundup Ultra and Roundup Ultra RT at 1 qt/A. Application must be made a least seven days before harvest and only when the crop is physiologically mature. Applicators must follow all instructions, precautions and warnings on the product label, and have a copy of the crisis exemption label in their possession during application.

    The exemption expires Oct. 1, 2000.

    The ND Department of Ag submitted documentation for a specific exemption to the U.S. EPA several weeks ago, but EPA had not yet acted on the matter.



    Empty plastic pesticide containers will be accepted for recycling at any of 38 collection sites in August.

    Farmers, ranchers, pesticide dealers and applicators can get rid of their plastic containers safely and free of charge. Containers up to 30 gallons will be accepted. The containers must be triple-rinsed or pressure-rinsed and the labels and lids removed before delivery to a collection site. The 30-gallon containers must be cut into at least four sections lengthwise. UAP Ostlund will later shred the containers before reselling them to recycling companies.

The collection dates, sites and times are as follows:

Aug. 11 - Drayton - UAP Northern Plains - 9-11 a.m
Aug. 11 - Grand Forks - UAP Northern Plains - 1-3 p.m
Aug. 11 - Bowman - Bowman Grain - 8 a.m.-Noon
Aug. 11 - New England - Fitterer Oil - Noon-4 p.m.
Aug. 12 - Dickinson - UAP - 8 a.m.-Noon
Aug. 15 - Carrington - UAP - 9-11 a.m
Aug. 15 - Harvey - Helm Flying - 1-3 p.m
Aug. 16 - Rugby - UAP - 9-11 a.m.
Aug. 16 - Rolla - Rolla Flying Service 1-3 p.m.
Aug. 18 - Devils Lake - UAP - 9-11 a.m.
Aug. 18 - Fairdale - Fairdale Farmers Elevator 1-3 p.m
Aug. 22 - Watford City - Taylor Ag - 8-10 a.m.
Aug. 22 - Parshall - Dakota Qu. Grain - 11 a.m.-1 pm
Aug. 22 - Minot - Dakota Agronomy Partners - 2-4 p.m.
Aug. 22 - Voltaire - Minot Farmers Elev. 9-11 a.m
Aug. 22 - Underwood - Benson Quinn - 1-3 p.m
Aug. 23 - Newburg - Farmers Union Oil - 8-10 a.m.
Aug. 23 - Lansford - Curt Undlin Co. - 11 a.m.-1 p.m.
Aug. 23 - Berthold - Berthold Farmers Elev. - 2-4 p.m.
Aug. 24 - Ambrose - Farmers Elevator - 8-10 a.m.
Aug. 24 - Tolley - Renville Elevator - 2-4 p.m.
Aug. 24 - Stanley - Farmers Union Oil - 2-4 p.m.
Aug. 25 - Williston - UAP - 8 a.m.-4 p.m.

UAP Northern Plains will accept containers 8:00 to 5:00 the week of 8-14-00 at Mapleton ND.



    State and provincial agricultural officials from the United States and Canada have agreed that rules and restrictions on farm chemicals and livestock drugs should be harmonized between the two countries.

    State officials have returned from the 10th Meeting of the States/Provinces Agricultural Accord in Saskatoon, Sask. Canadian and U.S. delegates agreed on the importance of harmonization in the area of agricultural chemicals and livestock drugs, including expanding joint registration and pursuing joint labeling of those products available in both countries to permit producers to purchase these products from the neighboring country.

    The accord is a three-day meeting of senior agricultural officials from 24 U.S. states, six Canadian provinces and 11 Mexican states, designed to improve understanding and strengthen collaboration among the agricultural sectors of the three neighboring countries.



Type of Document:

Section 18


Gramoxone Extra


Green Peas and Dry Peas
Grown for Seed


Harvest Aid

State: North Dakota
Issuing Date: July 27, 2000
Expiration Date: November 11, 2000

This label is also available through the applicable Zeneca web site

http://www.zenecaagproducts.com (for Zeneca Ag Products labels) or

http://www.zenecaprofprod.com (for Zeneca Professional Products labels)

and through our Fax on Demand service.


Richard Zollinger
NDSU Extension Weed Specialist



    In the recent issue of Dealer & Applicator, one of the contributing editors reviewed the benefits of using fall herbicide applications. In Nebraska, several farmers have opted for fall applications due to the continuing wet and dry cycles seen in the last few springs. Fall application allows more acres to be covered on a timely basis and allows specific weeds to be targeted, with more time for thought into the herbicide chosen. Like here in the Red River Valley, Nebraska had a fairly open winter this last winter and some weed control could be spread out. With this forethought into the overall weed control program, this spring allowed the use of early season liquid applications and thus, even with the short planting window, everything generally got in within a week or ten days.

    Early soil-applied herbicides had to be mechanically incorporated but the longer residual fall applications had already moved into the weed germination zone with winter rains and melting snow and were active. Convenience and performance have increased the use of fall applications, especially for dealers in northeast Nebraska, eastern South Dakota, Minnesota, Wisconsin and northern parts of Iowa and Illinois. With the use of targeted fall herbicide on your most troublesome weeds, the grower benefits as he isn’ t held up by weather in the spring and the dealer is able to make better use of equipment and employees.

    Review you overall weed management plan. Consider current weed seed banks in individual fields, weeds that created problems with your in-season controls, the weed biology of the troublesome weeds, if fall or spring control is more important on the weeds causing the most headaches and plan out a multiyear strategy to minimize if not eliminate these most troublesome weeds. Link up to the Web for more information at:

http://www.findarticles.com/cf_0/m1204/11_96/53377994/p1/article.jhtml ,

http://www.CPMmagazine.com ,

http://www.ent.iastate.edu/ipm/icm/1996/10-7-1996/riskreward.html ,

http://www.psu.missouri.edu/agronx/weeds/newsletterarticles/controlperennialweedsinthefall.html ,

http://www.ext.nodak.edu/extnews/newsrelease/1998/082098/04newequ.htm ,

http://www.farmland.com/agoperat/croptips/archive/fallweed.htm ,

http://info.aes.purdue.edu/AgAnswrs/1997/8-8Control_Weeds.html ,


http://www.ext.nodak.edu/extnews/weedpro/useinfo.htm .


Denise McWilliams
Extension Crop Production Specialist

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