ndsucpr_L_sm_W.jpg (13414 bytes)
weeds_Logo_Lg.jpg (6562 bytes)

ISSUE 1   May 4, 2000

   All Section 18 Emergency Labels that have been granted in North Dakota have been posted on the web and are up to date as of 5/1/2000.

    All 24c Labels granted in North Dakota since 1999 have been posted on the web and are up to date as of 5/1/2000.

The URL is: http://www.ag.ndsu.nodak.edu/aginfo/pesticid/pesticid.htm

Look under "What's Hot" or click on the green button on the left side of the page entitled "Pesticide Label Search".  All Labels are in PDF format and require Adobe Acrobat Reader software to view.


Summary of herbicide Section 18s cleared for ND in 2000:

Curtail M on flax
Liberty on Liberty Resistant canola
Muster on canola
Raptor on dry beans
Raptor on Clearfield canola
Sonalan on canola
Spartan on sunflower
Stinger on canola


Possible herbicide Section 18s submitted to EPA for 2000:

Plateau on pasture and rangeland for leafy spurge control
Poast on buckwheat
Roundup on flax for preharvest
Reflex on dry bean for common ragweed control


Herbicide Section 24c (SLN) registrations cleared:

Sonalan 10G on crambe
Sonalan HFP on crambe
Stinger on crambe



    The following web sites are excellent sources of weed ID, weed control, and herbicide information.

Review of Top 12 "Weed Science" Sites:

1. Oxford World Weeds Database Search: 

Taxonomic ID and database search engine
2. Resistant weed web site:  http://weedscience.com/
The most complete reference site for all resistant weed in the U.S. and the world.

3. EPA - Office of Pesticide Program
Latest progress in registration of all pesticides.

4. USDA Plant Photo Library
Over 20,000 plant photos

5. IR-4 Web Site
Registration status of pesticide on minor crops through the IR-4 program

6. ND Weed Control Guide
http://www.ext.nodak.edu/extpubs/plantsci/weeds/w253/ w253w.htm
Complete electronic version of the 2000 ND Weed Control Guide.

7. Crop Protection Reference 2000
Known in weed science circles as the "Green Bible" or "Blue Bible" contains all labels for most all pesticides currently labeled. Free service allows search and printing of all labels. Must have Adobe Acrobat Reader but can down the software from this site.

8. Oregon State University:
Over 90 links for weed ID and miscellaneous information.

9. Purdue Pest Survey and Information Site:
Alphabetic pest search guide.

10. Idaho Noxious Weed ID Site:
Good western noxious weed ID site with pictures and descriptions.

11. Federal Wildlife Service:
Noxious weeds and exotic and invasive plant management resources.

12. University of California Davis weed:
One of the most frequented university sites.


Weed ID web sites of interest:

American Cyanamid Weed Guide: www.cyanamid.com/tools/weedguide/index.shtml

UC Pest Management Guidelines & Photo Gallery: www.ipm.ucdavis.edu/PMG/r785700999.html

CropNet - www.CPMmagazine.com

FMC Weed ID - www.ag.fmc.com/ag/weedbug/

Idaho Noxious Weeds - www.oneplan.state.id.us/pest/nw00.htm

University of Illionis Weed ID - www.web.aces.uiuc.edu/weedid/

Iowa State Weed ID - www.weeds.iastate.edu/weed_id/weedid.htm

Noxious Weeds of Kansas - www.ink.org/public/kda/phealth/phprot/weeds.html

Common weed seedlings of Michigan - www.msue.msu.edu/msue/iac/e1363/e1363.htm

Oregon Weed ID Site - www.css.orst.edu/weeds/id.html

University of New England Weed ID - www.une.edu.au/agronomy/weeds/photo_library/ph_lib.html

Rutgers Cooperative Extension - Weeds of New Jersey - www.rce.rutgers.edu/weeds/index.html

Virginia Tech Weed Identification Guide - www.ppws.vt.edu/weedindex.htm

WSSA Photo Herbarium - http://ext.agn.uiuc.edu/wssa/subpages/weed/herbarium0.html

Wyoming Noxious Weed Photos - www.uwyo.edu/plants/weeds/id/


Weed Control sites of interest:

Biological Control of Weeds - www.ctpm.uq.edu.au/Literature/Biocontrol_Weeds.html

Biocontrol of Leafy Spurge - www.gov.sk.ca/agfood/farmfact/biocon.htm

Common Weeds of No-till Cropping Systems - www.btny.purdue.edu/Extension/Weeds/NoTillID/


Weeds in Minnesota Wheat - www.smallgrains.org/techweed.htm


   A website called AgSupplier.com can be used to get quotes on pesticide prices or to purchase pesticide through the web.


   Trifluralin is frequently incorporated prior to establishing and in established shelterbelts. Thrifluralin had demonstrated excellent tree tolerance under varies soil and weather conditions. There are numerous products and labels vary considerably. Several common trifluralin products are listed below.

    Treflan 5G (Dow) had registration for use in many tree and woody species used in shelterbelthas. Treflan 5G, a speciality product, has been discontinued and is not available, leaving no DOW liquid product technically labeled for shelterbelt plantings.

    Treflan 4HFC and TR10 (Dow) labeling does not include ornamental or non-food trees typically used in shelterbelt tree plantings. Technically the labeling allows for use in citrus, fruit, and nut trees. Rates for 4HFP are 1 to 2 pt/A for new tree plantings and 2 to 4 pt/A for established trees. Rates for TR10 are 5 to 7.5 lb/A for new tree plantings and 10 to 20 lb/A for established trees.

    Trifluralin 4EC (Terra) includes labeling for ornamental and woody shrubs, trees, and flowers. The list includes many shelterbelt species. A Section 24c add nearly all remaining shelterbelt species. Excellent choice but availability is limited.

    Trust (Cenex) and Trilin (Griffin) are 4EC formulations of trifluralin and are labeled similar to Terra product described above but does not contain a Section 24c to include other tree species.

Tri-4 (American Cyanamid) - Discontinued.

    Pendimethalin (Pendulum 3.3EC, 60WDG, or 2G) is a related DNA herbicide. Pendulum has a speciality label that allows use in several ornamental trees, shrubs, ground cover, and perennial flowers. These products are applied PRE (not incorporated) and after planting. Labels do not contain all shelterbelt species used. Rates are 2.4 to 4.8 qt 3.3EC/A. Rates for the other formulations are adjusted accordingly. The ag pendimethalin formalation (Prowl 3.3EC) does NOT include ornamental or tree uses.

    There are many trifluralin products on the market. However, individual product labels may differ even though they contain the same active ingredient and concentration. However, some label may not contain registrations for use in certain tree plantings. Uses as designated on trifluralin label are more targeted for marketing programs or legal aspects than biological differences. There have been no problems reported with current use patterns. It may be possible to obtain label changes or special labeling that will help solve these discrepancies and allow use of trifluralin under different trade names in shelterbelts.

Richard Zollinger
NDSU Extension Weed Specialist

 cprhome.jpg (3929 bytes)topofpage.jpg (3455 bytes)tableofcontents.jpg (4563 bytes)previous.jpg (2814 bytes)next.jpg (1962 bytes)