See "Site Preparation", "Labeled 'L' Uses for Glyphosate in Vegetable Crops" (table), and "Registered Uses of Carfentrazone (Aim) Herbicide in Food Crops" (table)" at the beginning of "Section N. Vegetable Crops" 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