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Herbicide Adjuvants. Proceedings of a Symposium of the Weed Science Society of America February 8, 2000, Toronto, Canada

Adjuvants are essential for the optimum performance of most herbicides and are helping to revolutionize their use by allowing the shift from preventative, high-dose applications to low-dose, specifically targeted curative applications. As a result, today’s herbicides provide better targeted and more environmentally acceptable weed control. Several thousand adjuvants of widely varying quality are currently sold, and commercial success for a herbicide often depends on the ability of the manufacturer to ensure the right type and quantity of adjuvant. Manufacturers must prescribe adjuvants on the pesticide label so the user can readily tank-mix or include in the formulation. Discussion about the benefits of adjuvants has evolved from disbelief of outlandish claims to technical disputes over composition, terminology, and cost benefit. Usually the cost–benefit argument is not difficult, as adjuvants are usually less expensive than herbicides and can reduce herbicide dose 10-fold.