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ISSUE 13   July 25, 2002



Livestock producers who are buying hay or renting hay land should make sure they are not bringing home any noxious weeds. Severe drought is forcing many stockmen to buy hay or rent hay land outside their home areas and buyers should check for the presence of noxious weeds, such as leafy spurge, Canada thistle or any of the knapweeds, in hay they buy or hay land they rent.

Noxious weeds may not appear to be a major problem in the dry areas, the potential damage to their own property and the prospect of long-term and expensive weed control should cause producers avoid bringing home weed-infested forage. Most noxious weeds are perennial plants that require expensive herbicides to control. An ounce of caution now when purchasing hay or renting hay land could mean saving thousands of dollars in the future.

Producers unsure of weed identification should consult with their county extension agents, county weed officers or Natural Resources Conservation Service staff on proper identification of potential problem weeds in hayfields.

North Dakota's noxious weed list include absinth wormwood, Canada thistle, diffuse knapweed, field bindweed, leafy spurge, musk thistle, purple loosestrife, Russian knapweed, spotted knapweed and yellow starthistle.



Openings are now available for North Dakota sunflower producers who want to participate in the 2002 cattail management program. The program, conducted by the Wildlife Services division of the U.S. Department of Agriculture's Animal and Plant Health Inspection Service,

provides aerial applications of herbicide to reduce cattail density. The removal of cattails helps disperse large concentrations of blackbirds which move from the cattails to feed in nearby sunflower fields. There is no charge to landowners participating in the program.

Interested landowners should contact the USDA-APHIS Wildlife Services, 2110 Miriam Circle, Suite A, Bismarck, ND 58501; telephone: (701) 250-4405.



Monsanto has announced intention to request a Supplemental Label (24c) registration for Roundup Original (only) for use as a desicaant and spot treatment in dry edible beans. The ND Department of Ag has had Section 24(c) requests for this use several times over the past few years. Each time a request was made the Northavest Bean Growers Association was asked whether their growers want the ability to apply glyphosate preharvest. To date, the Northarvest Bean Growers have not supported a Section 24(c) registration allowing the preharvest use of glyphosate on dry beans.

The position from the Northarvest Bean Growers is that if ND were allowed to apply Roundup Original in the manner described above it would put them at a marketing disadvantage against other states that do not have such a registration. For instance, the Michigan bean growers could make the pitch to a bean processor to not buy ND beans because they may have glyphosate residues (because only ND would have the registration). This is a concern because research has shown that glyphosate residues in beans could be high if the product is sprayed to bean plants that are still green.

Until there is a change in opinion from the Northarvest Dry Bean growers concerning this 24(c) registration, the state agency will not request this registration from EPA. It should be noted that a full registration for use of glyphosate in dry beans is on this year's workplan of EPA's Registration Division and was anticipated to be available by the use season.



The ND Dept of Ag has issued a special local needs (SLN) registration to Monsanto allowing North Dakota dry pea, lentil and chickpea producers to make preharvest applications and spot treatments of Roundup® Original to control Canada thistle and other weeds. Few herbicides are currently registered for use in dry peas, chickpeas, and lentils which supports this use of spot and preharvest use of Roundup to enable growers to prevent annual weeds from going to seed and prevent perennial weeds from causing problems in subsequent growing seasons. A similar SLN registration was issued to Dow AgroSciences for Glyphomax Plus on these crops. Applicators must follow all instructions, precautions and warnings on the product label and have a copy of the SLN supplemental labeling in their possession during application. The SLN registration expires July 23, 2007. Remember also that a ND SLN was issued recently for Gramoxone Max as a desiccant in dry pea, lentil and chickpea.



North Dakota and Minnesota agricultural departments are reviewing Monsanto’s request that the states issue a special local needs (24(c) SLN) label for the use of glyphosate on dry beans.

Monsanto’s application raises some difficult issues.

Monsanto’s request is for glyphosate to be used to control late season weeds, not desiccate green dry bean plants prior to harvest. The proposed label calls for application only after the dry bean seed reaches the hard dough stage, defined as 30% moisture or less.

If glyphosate were used as directed to control weeds - and not as a dry bean desiccant - there would likely be no problem.

In practical terms, it may be difficult to find a field to spray with glyphosate that doesn’t have some plants with seed that do not exceed 30% moisture due to variation in emergence and maturity. Dry bean seed from only a few treated plants could contaminate a truckload, or even a dealer’s entire bin.

Processors have repeatedly warned that they cannot accept any food product with residue that exceeds the federal tolerance. For glyphosate the tolerance level has been set at 5 ppm.

The state ag departments will continue to study the request.

(From Northarvest Newsletter, "Talkin Beans" - July 2002)



Since late last year, the EPA extended its comment period several times on its proposed new labeling statements for spray drift mitigation. The proposed action was intended to help reduce pesticide drift from spray applications in order to protect human health and the environment. For ground applications, a maximum wind speed of 10 mph and a droplet size as per label requirements were presented.

A huge public response resulted in one of the largest number of comments that have been submitted to EPA on a specific item. EPA has now announced that it has withdrawn its drift proposal and will issue a revised draft for additional future comment.

In general, farmers and the agricultural community did not favor the draft proposal but private citizens did. Application height especially for aerial applicators was too restrictive, enforcement issues were too vague to enforce, and economic hardships caused by new equipment purchases were the primary concerns raised.

In the meantime the EPA is planning to seek dialogue and conduct stakeholder workshops to solicit additional input. The agency will then prepare another draft pesticide registration notice for public comment.

Richard Zollinger
NDSU Extension Weed Specialist


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