By Leon Wrage, SDSU Extendion Weed Specialist,
and Darrell Deneke, SDSU Extension IPM Coordinator
Small grain crops are sometimes harvest for livestock forage: either as part of a planned program or as a supplemental or emergency forage source. Serveral cereal herbicides have restrictions on crop use for forage. Residue data is lacking for some, especially for products used on crops intended for grain harvest. For these herbicides, it appears to be more an issue of lacking data rather than toxicity concerns. For others, forage use is not restricted or the interval since application is sufficently short to allow forage use. Recommendations for any use of treated crops are based on EPA label approval where residue tolerances have been ser. For combination treatments, use the most restrictive guideline.
(Days after Application)
Bronate, Buctril - Do not graze treated fields for 45 days.
MCPA, 2,4-D - Do not graze dairy or slaughter animals for 2 weeks. Grass hay harvest is allowed 30 days after application.
Banvel, Clarity - Do not harvest hay for 37 days. Do not graze lactating dairy for 7 days; no grazing restrictions for non-lactating dairy.
Starane - Do not graze or harvest forage within 7 days or apply within 14 days of cutting for hay.
Aim - Do not harvest for forage for 7 days. No grazing restrictions stated.
Curtail, Curtail M, Stinger - Do not forage or graze lactating dairy or slaughter animals for 7 days after treatment. Do not harvest hay from treated grain fields.
Stampede, Harmony GT, Assert, Express, Avenge, Harmony Extra, Canvas, Ally Extra - Do not graze or feed forage or hay from treated areas.
Ally, Amber, Puma - No restrictions.
Maverick - Do not harvest for 30 days.
Peak - Do not graze or harvest hay for 30 days or harvest silage for 40 days.
Everest - Minimum harvest interval is 60 days; straw may be used for feed.
Discover - Do not graze or feed forage from treated areas for 30 days.