Traill County Ag Alert Newsletter

Traill County Ag Alert Newsletter

July 3, 2008

RAINFALL & GROWING DEGREE DAYS (GDD)

Location Mayville Hillsboro Galesburg

Corn GDD                                 685                  697                    683
Compared to 2007                    -198                -195                  -189
5 Year Average                           -89                    -83                    -63

Wheat GDD                           1579               1586                  1591
Compared to 2007                   -307                -312                   -279
5 Year Average                        -168                -166                   -114

Rainfall since June 1                  2.61 inch          3.81 inch          3.79 inch

PREHARVEST INTERVALS FOR SMALL GRAIN FUNGICIDES
A recent temporary embargo of some Kansas wheat occurred because the fields had been treated with Quilt fungicide beyond the appropriate preharvest interval (PHI) for that product (45 days). The following preharvest intervals are indicated on our currently registered small grain fungicides:

Product                  PHI
Headline*             Feekes 10.5 (~ 40 days PHI)
Quadris                 45 days
Caramba               30 days
Folicur**              30 days
Proline                  30 days wheat, 32 days barley
Tilt**                    40 days
Quilt                      45 days
Stratego                35 days

* Headline is the only product that doesn’t specify number of days in their PHI. Feekes 10.5 is approximately 40 days before harvest in ND, depending on air temperatures. Hot temperatures push the crop to flowering, Feekes 10.51, more quickly.

** Additional tebuconazoles such as Orius, etc., or additional propiconazoles, such as Propimax, etc., have ND state supplemental labels that specify the same PHIs as the original registered products.

Products recommended by NDSU for heading or flowering application for Fusarium head blight suppression all have 30 day PHIs in wheat (32 days for Proline in barley), a duration that should allow ample time in ND for maturity before swathing or harvest.

Producers and applicators need to take heed of these PHIs, as what happened in Kansas is a very strong reminder that labels are the law and must be followed.

FOLICUR AND GENERIC FORMULATIONS RECEIVE LABEL FOR SCAB CONTROL
Folicur (tebuconazole) has received a full label and we have been wondering about the availability of generic formulations of tebuconazole for use on wheat and barley to manage Fusarium head blight (scab).

As stated earlier, Bayer CropScience recently received a full federal registration for use of their tebuconazole product Folicur 3.6 Foliar Fungicide (EPA Reg. No. 264-752) on wheat and barley. Bayer CropScience has also received a full federal registration for its tebuconazole/prothioconazole product Prosaro 421 SC Fungicide (EPA Reg. No. 264-862) on wheat and barley.

Since the issuance of the full registration to Bayer for use on its Folicur product on wheat and barley, EPA has received registration applications from several generic tebuconazole manufacturers. EPA is working hard to review these applications as soon as possible. Registrations granted to date by EPA for generic tebuconazole products on wheat and barley include:

A. Orius 3.6 F (EPA Reg. No. 264-752-66222) from MANA

B. Monsoon (EPA Reg. No. 34704-900) from Loveland Products

C. Emboss (EPA Reg. No. 1381-203) from Winfield Solutions

D. Embrace (EPA Reg. No. 1381-203) from Winfield Solutions/Agriliance

Please note that users of these approved products on wheat and barley must have a copy of the labeling in their possession that allow for use on these crops. In most cases, use is allowed under supplemental labeling that can be obtained from your local dealer or on the North Dakota Department of Ag’s online pesticide registration database (http://www.kellysolutions.com/nd/pesticideindex.htm).

Applications for other generic tebuconazole products are being reviewed by EPA, including many of the generic products that were allowed under last year’s Section 18 exemption. Based on a discussion’s with EPA, several more generic tebuconazole products should be registered for use on wheat and barley within the next couple of weeks. However, users are reminded that the only tebuconazole products approved for use on wheat and barley are those discussed above.

AGRONOMY SEED FARM FIELD TOUR JULY 14
Crop production, variety development and farm energy considerations are among the topics at this year's field day at North Dakota State University's Agronomy Seed Farm near Casselton. The tour will start at 5:30 p.m. at the Agronomy Seed Farm shop.

People attending the event also will be able to get their water tested free of charge for nitrates, total dissolved solids, pH (acidity or alkalinity) and hardness. Samples should be collected in any clean plastic bottle capable of holding 15 to 20 ounces. NDSU Extension water quality specialists recommend that people allow their water to run for 30 seconds and then rinse the bottle three times before filling it.

The field tour will wrap up with a sponsored meal in the farm shop about 8 p.m. The Agronomy Seed Farm is a mile south of Casselton and a mile west on the frontage road that parallels Interstate 94 on its north side.

CARRINGTON RESEARCH EXTENSION CENTER FIELD DAY JULY 15
Crop production and beef research are featured at the 2008 Carrington Research Extension Field Day July 15. The field day will begin at 9 a.m. with registration and coffee. The tour will start at 9:30 and run until noon.

People attending the event also will be able to get their water tested free of charge for nitrates, total dissolved solids, pH (acidity or alkalinity) and hardness. (See article above for instructions on water sample collection)

For more information about the field day, contact the center at (701) 652-2951 or visit its Web site at http://www.ag.ndsu.nodak.edu/carringt/. The center is 3.5 miles north of Carrington on U.S. Highway 281.

POTATO LEAF HOPPERS IN DRY BEANS
The following information is from Eben Spencer with ADM. We are just starting to get early reports of potato leafhoppers (PLH) moving into dry edible bean fields. This is the time during the life cycle of edible beans when they are most vulnerable to the PLH - when they are small and less able to resist insect attacks. You may remember how serious leafhoppers were throughout our region last year.

Remember to look under the leaves, and look for the tiny nymphs running sideways, or adults jumping/flying from plant to plant. Numerous insecticides are available and we recommend spraying when plants have one or more potato leafhopper per trifoliate, or stunting/hopperburn is evident. However, as with all pesticides, especially insecticides, only spray when necessary, and please follow label directions closely.

ALFALFA WEEVIL
Alfalfa weevil is a problem in at least one field in Traill County. The field has a brownish look to it from the road. The top leaves are shot holed with brown around the holes. The weevil larvae are lime green with a white stripe and only 1/16 to 1/8 inch in length and difficult to see in the field. Collect some plants and shake them over a white sheet of paper to see if you have weevil larva. Treat newly cut alfalfa if the weevils are causing defoliation of 25%. If you have not harvested the alfalfa, harvest and watch the regrowth for damage.

YELLOW ASH TREES
We are seeing a number of ash trees that did not leaf out adequately this spring and the leaves that are present are yellow. As of today, I do not know what is happening but we are investigating to identify the problem. If you have ash trees that are exhibiting these symptoms do not fertilize them as it will not help.

NDSU Extension Service, North Dakota State University of Agriculture and Applied Science, and U.S. Department of Agriculture cooperating, Duane Hauck, Director, Fargo, North Dakota. Distributed in furtherance of Acts of Congress of May 8 and June 30, 1914. We offer our programs and facilities to all persons regardless of race, color, national origin, religion, sex, handicap, age, Vietnam era veteran status, or sexual orientation; and are an equal opportunity employer.

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Traill County Extension Office

P.O. Box 730

Hillsboro, ND 58045

701-636-5665 or toll-free1-877-843-6383