Kerb® 50-W Chemigation Labeling For Head Lettuce, Endive, Escarole, And Radicchio In Arizona And California.pdf

Key points include:

- Restricted Use: Due to tumor production in lab animals, pronamide is only for retail sale and use by Certified Applicators or their supervision, adhering to certification guidelines.
- Labeling Requirements: All applicable use directions, precautions, and restrictions must be followed, including federal law compliance and possession of the labeling during application.
- Permitted Uses: Chemigation is authorized for weed control in direct-seeded or transplanted head lettuce, endive, escarole, and radicchio before weed emergence. Pre- or post-emergence applications are permitted under specific conditions.
- Application Rate: Kerb 50-W should be applied at a rate of 1-2 lbs per acre (0.5-1 lb active ingredient), depending on soil type, weed species, and infestation level.
- Split Applications: Up to half the maximum allowable application rate can be initially applied, with the remainder applied up to 10 days later, totaling no more than 2 lbs/acre per crop season. A Pre-harvest Interval (PHI) of 55 days must be observed.
- Application Timing: Optimal timing varies by season and environmental conditions, but generally falls between 1-6 days after starting sprinklers.
- Equipment Requirements: Suitable chemigation equipment includes center pivot, lateral move, solid set, or hand move systems with uniform delivery pressure and positioning for complete coverage.
- Mixing and Application Instructions: Mixing tanks should be large enough to contain the entire mixture, using a minimum of 3 gallons of water per pound of Kerb 50-W. Injection hoses must be braided reinforced construction. Agitation is required during mixing and application. For hand move or solid set systems, injection should take 1-2 hours, followed by an additional 4-6 hours of irrigation to flush the system.
- Use Restrictions:
- Limited to August-September in Fresno County.
- Preharvest Interval: 55 days.
- Maximum of one application per crop or two if split, with no postemergence applications on endive, escarole, or radicchio greens.
- Total application limit of 2 lbs/acre (1 lb active ingredient).
- Chemigation Instructions: Only use approved irrigation systems and follow instructions precisely to avoid crop injury, lack of effectiveness, or illegal pesticide residues.