Types of AdjuvantsĪdjuvants that can be used with herbicides include surfactants, oil concentrates, nitrogen fertilizers, spreader-stickers, wetting agents, and penetrants. Therefore, the applicator must understand the composition and function of each product while considering expected environmental conditions at the time of application to properly match the adjuvant to individual herbicides or tank mixtures. There is a diverse array of adjuvant products and brands. Each herbicide manufacturer may have supplemental labels or fact sheets that provide additional guidance for the use of adjuvants for specific application situations, weed species, crops, or tank mixtures.

Other herbicides have specific adjuvant recommendations that MUST be added to the spray mixture. Some herbicides, such as Roundup PowerMAX® 3 Herbicide, are formulated with sufficient adjuvants and may not require the use of additional adjuvants. The label provides guidance and adjuvant options to address tank mixtures, environmental conditions, or weed species characteristics. Each herbicide product has adjuvant requirements that are specified on the herbicide label. Labels MUST be followed since use of an herbicide product in a manner inconsistent with its labeling is a violation of federal law. Utility modifiers, such as buffering, antifoam, and drift control agents, typically modify the characteristics of the spray solution and product compatibility.Activators, such as surfactants, crop oil concentrates (COC), and nitrogen (N) are normally used to help improve the performance of herbicides by increasing herbicide retention or penetration into leaf surfaces, improving rain fastness, or to decrease photodegradation of herbicides.1Īdjuvants can be classified as activators and utility modifiers (or special purpose adjuvants): Adjuvants include spreaders, stickers, wetting agents, penetrants, stabilizing agents, compatibility agents, buffering agents, antifoam agents, and others. Adjuvant recommendations are specific for each herbicide product as researched and developed by the herbicide manufacturers. Herbicide labels, which MUST be read and followed, are the most important source of information for adjuvant recommendations and cover diverse use situations and tank mixtures. Check product labeling or your local state agency for more information.Adjuvants in herbicide formulations and spray mixtures can help improve herbicide application and performance. Check to be sure a specific use pattern is approved in your area before use. Note: Products may not be registered for use in your state or locale. and Nuphar spp.) and bladderworts (Utricularia spp.) also can be affected. Desirable native species that may be affected include native milfoils, coontail ( Ceratophyllum demersum ), naiads ( Najas spp.), elodea ( Elodea canadensis ) and duckweeds ( Lemna spp.). Accordingly, 2,4-D has been used for whole-lake treatments.Ģ,4-D is effective at treating the invasive Eurasian watermilfoil ( Myriophyllum spicatum ). Recently, some studies have found that 2,4-D moves quickly through the water and mixes throughout the waterbody, regardless of where it is applied. Treatments should be made when plants are growing.įor many years, 2,4-D has been used primarily in small-scale spot treatments.

Plants begin to die in a few days to a week following treatment, but can take several weeks to decompose. When the treatment occurs, the 2,4-D is absorbed into the plant and moved to the roots, stems, and leaves. Both liquid and slow-release granular formulations are available.Ģ,4-D is a widely-used herbicide that affects plant cell growth and division. There are two types of 2,4-D used as aquatic herbicides: dimethyl amine salt and butoxyethyl ester. The active ingredient is 2,4-dichloro-phenoxyacetic acid. It has been in use since 1946, and was registered with the EPA in 1986 and re-reviewed in 2005. Aquatic 2,4-D Herbicides for Lakes and PondsĢ,4-D is a herbicide that is widely used as a household weed-killer, agricultural herbicide, and aquatic herbicide.

2 4 d herbicide