See "Site Preparation, Stale Seedbeds, and Selective Postemergence Applications" at the beginning of Section P. in this handbook.
paraquat (Gramoxone Inteon; 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.
Remarks Acts on contact; absorbs energy produced by photosynthesis, forming peroxides that disrupt living cells.
Caution Restricted-use herbicide. Do not ingest or inhale spray mist. Wear protective face shields, respirators, and clothing.
Site of action Group 22: photosystem 1 electron diversion
Chemical family Bipyridilium