See "Site Preparation, Stale Seedbeds, and Selective Postemergence Applications" at the beginning of Section P. in this handbook.
paraquat (Gramoxone; 2 lb paraquat cation/gal)
Rate 0.50 to 1 lb cation/a (2 to 4 pints/a); use higher rates for heavy weed infestation.
Time Apply just before crop emerges to emerged weeds only. Add a nonionic surfactant or crop oil concentrate as label specifies, taking care to avoid anionic formulations that react in the tank to form insoluble precipitates.
Caution Paraquat is a restricted-use herbicide. Do not ingest or inhale spray mist. Applicators must wear long-sleeve shirt and long pants, shoes plus socks, protective eyewear, chemical-resistant gloves, and a NIOSH-approved particulate respirator or approved powered air-purifying respirator.
Site of action Group 22: photosystem 1 electron diversion
Chemical family Bipyridilium