Stale Seedbed
The following herbicides are nonselective and are used to control weeds which are present in a field prior to planting or before the crop emerges, which is especially useful for the Stale Seedbed Technique (see the Weed Management section for more information).
- glyphosate (Roundup Power Max): PHI 14d, REI 4h, Group 9.
- pelargonic acid (Scythe): PHI 1d, REI 12h, Group 0.
Preemergent Herbicides (before weeds germinate)
HRAC Group 15:
cycloate (Ro-Neet): 0.33 to 0.67 gal/A. PHI 21d, REI 48h. 1 application per year. Apply before, during, or immediately after planting.
s-metolachlor (Dual Magnum): PHI 50d, REI 24h. MA, ME, and NH only. Restricted label: Make sure the label for your state is available for download before using this product. Full label instructions are supplied to growers who apply through the website www.syngenta-us.com/labels/indemnified-label-login and agree to a waiver of liability. Main target weeds for this registration are galinsoga and yellow nutsedge.
Postemergent Herbicides (after weeds germinate)
HRAC Group 0:
- pelargonic acid (Scythe): 3 to 10% solution. PHI 1d, REI 12h. Apply as vegetative burndown prior to planting, or as a directed and shielded spray during crop growth. Contact with crop will cause damage.
HRAC Group 1:
- clethodim (Select Max): 9 to 16 fl oz/A. PHI 14d, REI 24h. Do not exceed 64 fl oz/A per year. Apply to actively growing grasses.
sethoxydim (Poast): 0.5 to 1.5 pt/A. PHI 15d, REI 12h. Do not exceed 3 pt/A per year. Apply to actively growing grasses. BASF has stopped production and will discontinue the registration at the end of 2027.
HRAC Group 4:
- clopyralid (Stinger): 0.25 to 0.5 pt/A. PHI 21d, REI 12h. Do not exceed 0.5 pt/A per year. Apply when spinach is in the 2- to 5-leaf stage. Some leaf curling may appear, especially at high application rates. Spray additives are not recommended.
HRAC Group 9:
- glyphosate (Roundup Power Max): 10 fl oz to 3.1 qt/A. PHI 14d, REI 4h. Do not exceed 5 qt/A per year. Apply during fallow intervals, prior to planting, at planting, before crop has emerged, or to row middles with a hooded or shielded sprayer or wiper applicator. Spray contact will cause crop death.
HRAC Group 14:
- carfentrazone (Aim EC): 0.5 to 2 fl oz/A. PHI 0d, REI 12h. Do not exceed 6.1 fl oz/A per season. Apply as a preplant burndown no later than 7 days before seeding or 1 day before transplanting crops, or apply with a hooded sprayer to row middles of emerged crops. Contact with crop will cause damage.