North Dakota State University Extension Service

May 26, 2005

WILD OATS....... ARE HERE AGAIN!!!

Recent rains and continued cool weather are resulting in the emergence of a large flush of wild oats. The following paragraphs are helpful reminders with the small grain wild oat herbicides.

Puma:
Labeled on wheat, durum, 6-row and 2-row barley. Do not tank-mix 2,4-D amine or 2,4-D ester with Puma at anytime.

Do not apply to barley after jointing begins: This is very important for barley will reach the jointing stage by the 5 leaf stage. The 2-row barley varieties, especially Conlon, are considerably earlier in maturity than the 6-row types. Conlon typically begins to joint by the 4 2 leaf stage. Do not tank-mix Buctril or Bronate Advanced (or their generic with equivalents) with Puma on 2-row barley. Puma at higher rates is safer than Puma at lower rates. For additional safening of Puma on barley, mix Harmony GT + MCPA ester or Harmony GT + Starane. If temperatures are expected to drop below 40°F 2 days before or 3 days after application, do not apply Puma to barley.

Wheat/Durum wide window of application: emergence to 60 days before harvest.

Puma has provided more consistent wild oat control under cool, damp conditions compared to warm, dry conditions.

Achieve SC

Labeled on wheat, durum and barley from 2 leaf to boot. An excellent option for barley that has already reached the jointing stage. There will be less crop response with barley in the 5 to 6 leaf stage compared to barley in the 3 to 4 leaf stage. Achieve can be tank-mixed with MCPA ester, bromoxynil, bromoxynil + MCPA, 2,4-D ester, Curtail M, Harmony GT and Starane. Tank-mixing other herbicides, especially dicamba (clarity, others) or SU herbicides will result in reduced wild oat control. Add AMS at 7.5 to 15 lb/100 gal water. Achieve is more active under cool, damp conditions. Add Supercharge and Achieve conditioner according to label directions.

Silverado:

ALS mode of action that will control ACC-ase resistant wild oat. Labeled in spring wheat and durum only. Can be applied from emergence to prior to jointing. Silverado at 1.75 oz/A will control wild oat from the 1 leaf to 2-tiller stage. Consult label for Silverado needs to applied with a Bayer approved adjuvant, either a Methylated Seed Oil at 1.5 pt/A or Basic Blend at 1% v/v (0.8 - 1.6 pt/A). Refer to label for tank-mix information. Do not use 2,4-D with Silverado. Do NOT apply to barley.

Discover/Discover NG:

Labeled in wheat, durum, and winter wheat only, from the 2 leaf to 4^th tiller stage. Discover at 3.2 fl oz/acre plus DSV adjuvant at 10.2 fl oz/A or Discover NG at 12.8 oz/A will control wild oat. For ground applications use 5 - 10 gallons of water per acre. Use 10 gallons of water per acre if conditions are dry or with dense weed populations. Avoid applications when temperatures may fall below 40°F within 48 hours prior to or after application. The addition of a MSO can enhance weed control under dry conditions.

ALS mode of action that will control ACC-ase resistant wild oat. Labeled in wheat, durum and winter wheat from the 1 leaf to 4 leaf stage (prior to jointing). Apply 0.3 oz/A for green foxtail, 0.4 to 0.6 oz/A for wild oat, cheat, and yellow foxtail. Use the higher rates for yellow foxtail and for high grass weed densities. Everest at 0.6 oz/A will control wild oat up to the 4 leaf stage. Apply with basic blend adjuvants at 1% v/v or NIS at 0.25% v/v except when adding an emulsifiable concentrate (EC) or ester formulated broadleaf herbicide as a tank-mix pardner. Do NOT apply to barley.

Always apply Everest with a broadleaf herbicide. Dicamba or 2,4-D is required for safening when tank-mixing with SU herbicides (Express, Harmony Extra, Harmony GT, others). Everest is more active under cool, moist conditions. Consult label for rotation restrictions. Everest is the only POST grass product labeled on spring wheat with activity on downy brome.

ALS mode of action that will control ACC-ase resistant wild oat. Labeled in wheat, durum, and barley from the 2 leaf to jointing stage. Assert will control 1 to 4 leaf wild oat. Consult label for rotation restrictions.

Assert has provided more consistent wild oat control in hot, droughty conditions than other POST wild oat herbicides. Apply with a MSO oil for more consistent control. Do NOT tank-mix Assert with Stampede, dicamba (Clarity), MCPA amine or 2,4-D amine.

Hard (high pH) water can cause the Assert to thicken resulting in the herbicide to come out of solution. To reverse this or lower the pH, Muriatic acid (10% HCL to 100%HCL) can be added to the spray tank. Add only enough to change the solution to a liquid state which is usually less than 1 gal/100 gallons if for a 10% HCL conc.

Dan Folske
Extension Agent/Burke County
Soil Conservation Technology Specialist
PO Box 280
Bowbells, North Dakota 58721
dfolske@ndsuext.nodak.edu
701-377-2927


North Dakota State University Extension Service - Burke County
	Burke County AgAlert
	May 26, 2005 WILD OATS....... ARE HERE AGAIN!!! Recent rains and continued cool weather are resulting in the emergence of a large flush of wild oats. The following paragraphs are helpful reminders with the small grain wild oat herbicides. Puma: Labeled on wheat, durum, 6-row and 2-row barley. Do not tank-mix 2,4-D amine or 2,4-D ester with Puma at anytime. Do not apply to barley after jointing begins: This is very important for barley will reach the jointing stage by the 5 leaf stage. The 2-row barley varieties, especially Conlon, are considerably earlier in maturity than the 6-row types. Conlon typically begins to joint by the 4 2 leaf stage. Do not tank-mix Buctril or Bronate Advanced (or their generic with equivalents) with Puma on 2-row barley. Puma at higher rates is safer than Puma at lower rates. For additional safening of Puma on barley, mix Harmony GT + MCPA ester or Harmony GT + Starane. If temperatures are expected to drop below 40°F 2 days before or 3 days after application, do not apply Puma to barley. Wheat/Durum wide window of application: emergence to 60 days before harvest. Puma has provided more consistent wild oat control under cool, damp conditions compared to warm, dry conditions. Achieve SC Labeled on wheat, durum and barley from 2 leaf to boot. An excellent option for barley that has already reached the jointing stage. There will be less crop response with barley in the 5 to 6 leaf stage compared to barley in the 3 to 4 leaf stage. Achieve can be tank-mixed with MCPA ester, bromoxynil, bromoxynil + MCPA, 2,4-D ester, Curtail M, Harmony GT and Starane. Tank-mixing other herbicides, especially dicamba (clarity, others) or SU herbicides will result in reduced wild oat control. Add AMS at 7.5 to 15 lb/100 gal water. Achieve is more active under cool, damp conditions. Add Supercharge and Achieve conditioner according to label directions. Silverado: ALS mode of action that will control ACC-ase resistant wild oat. Labeled in spring wheat and durum only. Can be applied from emergence to prior to jointing. Silverado at 1.75 oz/A will control wild oat from the 1 leaf to 2-tiller stage. Consult label for Silverado needs to applied with a Bayer approved adjuvant, either a Methylated Seed Oil at 1.5 pt/A or Basic Blend at 1% v/v (0.8 - 1.6 pt/A). Refer to label for tank-mix information. Do not use 2,4-D with Silverado. Do NOT apply to barley. Discover/Discover NG: Labeled in wheat, durum, and winter wheat only, from the 2 leaf to 4^th tiller stage. Discover at 3.2 fl oz/acre plus DSV adjuvant at 10.2 fl oz/A or Discover NG at 12.8 oz/A will control wild oat. For ground applications use 5 - 10 gallons of water per acre. Use 10 gallons of water per acre if conditions are dry or with dense weed populations. Avoid applications when temperatures may fall below 40°F within 48 hours prior to or after application. The addition of a MSO can enhance weed control under dry conditions. Wheat has excellent tolerance to Discover; do NOT apply to barley. Discover will control wild oats consistently over a wide range of environmental conditions. Discover is antagonized much less than other wild oat herbicides when tank-mixed with other pesticides. See label for all approved tank-mix options. Everest: ALS mode of action that will control ACC-ase resistant wild oat. Labeled in wheat, durum and winter wheat from the 1 leaf to 4 leaf stage (prior to jointing). Apply 0.3 oz/A for green foxtail, 0.4 to 0.6 oz/A for wild oat, cheat, and yellow foxtail. Use the higher rates for yellow foxtail and for high grass weed densities. Everest at 0.6 oz/A will control wild oat up to the 4 leaf stage. Apply with basic blend adjuvants at 1% v/v or NIS at 0.25% v/v except when adding an emulsifiable concentrate (EC) or ester formulated broadleaf herbicide as a tank-mix pardner. Do NOT apply to barley. Always apply Everest with a broadleaf herbicide. Dicamba or 2,4-D is required for safening when tank-mixing with SU herbicides (Express, Harmony Extra, Harmony GT, others). Everest is more active under cool, moist conditions. Consult label for rotation restrictions. Everest is the only POST grass product labeled on spring wheat with activity on downy brome. Assert: ALS mode of action that will control ACC-ase resistant wild oat. Labeled in wheat, durum, and barley from the 2 leaf to jointing stage. Assert will control 1 to 4 leaf wild oat. Consult label for rotation restrictions. Assert has provided more consistent wild oat control in hot, droughty conditions than other POST wild oat herbicides. Apply with a MSO oil for more consistent control. Do NOT tank-mix Assert with Stampede, dicamba (Clarity), MCPA amine or 2,4-D amine. Hard (high pH) water can cause the Assert to thicken resulting in the herbicide to come out of solution. To reverse this or lower the pH, Muriatic acid (10% HCL to 100%HCL) can be added to the spray tank. Add only enough to change the solution to a liquid state which is usually less than 1 gal/100 gallons if for a 10% HCL conc. Dan Folske Extension Agent/Burke County Soil Conservation Technology Specialist PO Box 280 Bowbells, North Dakota 58721 dfolske@ndsuext.nodak.edu 701-377-2927
	Burke County AgAlert Main Menu
	NDSU Extension Service - Burke County Home page

North Dakota State University Extension Service - Burke County