Traill County Ag Alert Newsletter

Traill County Ag Alert Newsletter

May 22, 2008

NDSU CROP MANAGEMENT FIELD SCHOOL SCHEDULED FOR JUNE 19 AT CARRINGTON
A crop management field school will be offered Thursday, June 19, from 9 a.m. to 4:30 p.m. at the NDSU Carrington Research Extension Center. The school is for crop advisers, but the program also will be beneficial for farmers. The school will provide hands-on training on crop, pest and soil management using field research and demonstration plots.

Specific field sessions include:

* Weed identification - identify more than 60 living weed exhibits and review biology and control

* Herbicide mode of action - identify herbicide classes by examining crop and weed injury symptoms

* Wheat disease management - review disease forecasting and fungicide use strategies

* Insect management - review current insect concerns in grass and oilseed crops

* Corn and soybean – learn about plant nutrition

* Soil - explore below-ground factors affecting crop growth using a soil pit

For further details and preregistration information, contact the Carrington Research Center at (701) 652-2951 or go to http://www.ag.ndsu.nodak.edu/carringt/. A completed preregistration form and $50 fee is requested by June 16 ($75 after June 16). A total of 50 participants will be accepted on a first-come/first-served basis. An application has been submitted to the certified crop adviser program to provide participants with 4.5 integrated pest management, 0.5 soil and water management and 0.5 nutrient management continuing education units.

REMEMBER TO PLANT THE NON-BT CORN REFUGE REQUIREMENT FOR BT CORN
As part of your farm’s Insect Resistance Management (IRM) Plan for growing Bt corn, a non-Bt corn refuge is required by the U.S. Environmental Protection Agency. Refuge corn acres are hybrids that do not contain the Bt insect trait. The purpose for planting a corn refuge is to prevent or delay the development of resistance to Bt traits. In return, the sustainability of Bt corn should be improved, so Bt corn is around as a pest management tool against corn insect pests for a long time. Twenty percent of the corn acreage must be planted as a Bt corn refuge on each farm where Bt corn is planted.

Remember, it’s the law! There are different configurations and distance requirements for planting the refuge depending on the traits.

NDSU DISEASE FORECASTING WEB SITES
NDSU’s crop disease forecasting web sites have a new portal this year. Links to small grain disease forecasting, Sclerotinia disease forecasting, and potato disease forecasting are available at one web address: http://www.ndsu.edu/diseaseforecast

A person seeking information specifically on wheat disease risk, including fungal leaf diseases and Fusarium head blight (scab) may go directly to the following web address: http://www.ndsu.edu/scabforecast

This scab forecast web site has been reformatted for easier use. It provides information on the risk of Fusarium head blight (scab), as well as risk of the wheat leaf diseases, tan spot, Septoria blotch, and leaf rust. The risk of these four diseases is based on environmental conditions as recorded by the North Dakota Agricultural Weather Network (NDAWN) stations.

Toll-free telephone numbers of 1-888-248-7382 for small grain information and 1-888-482-7286 for Potato Late Blight will be activated for the current regional disease forecast information on May 30.

UPBEET PLUS GLYPHOSATE MIXTURE APPROVED
DuPont Chemical Company recently received approval of a 2(ee) label for the mixture of Upbeet with glyphosate applied to glyphosate-resistant sugarbeets. Upbeet may be applied at 0.25 to 1.0 ounce per acre in combination with glyphosate. The label suggests adding a nonionic surfactant (NIS) at 0.25 %v/v plus ammonium sulfate (AMS). This herbicide combination should improve the control of velvetleaf compared to glyphosate alone and may improve the control of additional weed species. The mixture of Upbeet plus glyphosate is the only mixture currently labeled for glyphosate-resistant sugarbeet. This mixture can ONLY be applied to glyphosate-resistant sugarbeets.

WILD OATS
Wild oats are coming on strong and producers need to be scouting their fields, especially the early seeded fields for wild oats and other weeds. The chart included (or attached if Ag Alert is emailed) is a quick reference for control of Wild Oats and other grasses. Remember this is only a reference you MUST read and follow each herbicide label!

Small Grain grass weed control from postemergence applications.

POST GRASS HERBICIDES	Wild oat	Green foxtail	Yellow foxtail	Barnyard grass	Downy brome	Japanese brome	Persian darnel	Annual ryegrass	Quack grass	Foxtail barley
Achieve Application Rate 6.9 fl oz Crop – 2-leaf to boot	E 1-6 leaf	G-E 1-5 leaf	G 1-5 leaf	F	N	N	G	G	N	N
Assert Application Rate 1 to 1.5 pt. Crop Stage – 2 leaf to jointing	F-G 1-4 leaf	P	P	P	-	-	-	-	N	N
Axial Application Rate 8.2 fl oz (Not for Durum) Crop Stage – 2 leaf to boot	E All grasses 1-6 leaf + 3 tillers	E	G-E	G-E	N	N	E	E	N	N
Discover Application Rate 3.2 to 4 fl oz (Not for Barley) Crop Stage --Wheat – 2 leaf to Boot	E 1-6 leaf	E 1-5 leaf	G-E 1-5 leaf	E	N	N	G-E	G-E	-	N
Everest (Short to long residual) Application Rate 0.3 to 0.6 oz WDG (Not for Barley) Crop Stage -- Wheat 7 days Pre to Prior to jointing	G-E All Grasses Up to 4 Leaves	E	P-G	F-G	P-F	G	F-G	P-F	P-F	F
Maverick (Very Long residual)** Application Rate 2/3 oz DF (Not for Barley) Crop Stage -- Wheat 7 days Pre to prior to jointing	E All Grasses Up to 4 Leaves	P-F	P-F	P	F-G	G	-	P-F	G	-
Olympus (Very Long residual) Application Rate 0.6 to 0.9 oz/A WG Crop Stage -- Wheat 2 leaf to jointing	G-E	P-F	P-F	G	F-G 2-3 Tillers	E 2-3 Tillers	N	-	F-G	G
Puma Application Rate 0.33 to 0.66 pt Crop Stage – Wheat Emergence to 60 days PHI -- Barley 1 leaf to 4 leaf	E All Grass weeds 1 leaf to 2 tiller	E	E	E	N	N	-	-	N	N
Rimfire (Short to long residual) Application Rate 1.75 to 2.25 oz WG (Not for Barley) Crop Stage – Wheat 1 leaf to flag leaf emergence (BROADLEAF WEEDS Less than 2 inches tall)	G-E Grasses 1 leaf to 2 tiller	P-F	P-F	G	P-F	G	F-G	-	F	F-G
Avenge (Labeled on all barley varieties) (Refer to label for registered wheat varieties) Application Rate 2.5 to 4 pt Crop – Prior to flag leaf emergence	G-E 3-5 leaf	N	N	N	N	N	N	N	N	N
Silverado (Short Residual) Application Rate – 1.75 to 2.25 oz WG (Not for Barley) Crop – Wheat 1 leaf to prior to jointing (BROADLEAF WEEDS Less than 2 inches tall	G 1 leaf to 2 tiller	P	P	N	P	P-F	F-G	-	N	P-F

*Early fall applications provide better control that late fall or spring. Earlier spring application are more effective than late spring or mid-season application.
**Suggested for use only in continuous wheat because of crop rotation restrictions.

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Traill County Extension Office

P.O. Box 730

Hillsboro, ND 58045

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