diquat (REGLONE DESICCANT EPA# 100-1061, SLN# ID-100006)
Idaho-collard, dill, endive, garden beet, kohlrabi, leek, lettuce, mustard, onion, parsnip, radish, turnip, sugar beet, and Swiss chard seed
Oregon-cabbage, coriander, kohlrabi, onion, radish, rutabaga, spinach, sugar beet, Swiss chard, table beet, and turnip seed
Rate 0.375 to 0.5 lb ai/A (1.5 to 2 pints/A Reglone)
Time Apply 3 to 10 days before swathing for harvest, when most seed is harvest ripe (spinach is tan to gray ripe).
Remarks SLN labels ID-100006, OR-080025. Do not apply more than 2 pt/A per year.
Caution Do not apply through any type of irrigation system. Do not use seed or residues from treated plants for food, feed, or oil purposes. Do not use on daikon radish. SLN in WA has expired..
Site of action Group 22: inhibits photosystem I electron diversion
Chemical family Bipyridilium