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Precautions for Avoiding Injury Adjuvants <br /> to Nontarget Plants Postemergence applications of Arsenal require the addi- <br /> Untreated desirable plants can be affected by root uptake tion of a spray adjuvant. When making aquatic <br /> of Arsenal'herbicide from treated soil. Injury or loss of applications, only spray adjuvants approved or appropriate <br /> desirable plants may result if Arsenal is applied on or near for aquatic use must be used. <br /> desirable plants, on areas where their roots extend, or in Nonionic Surfactant <br /> locations where the treated soil may be washed or moved <br /> into contact with their roots.When making application Use a nonionic surfactant(NIS) at the rate of 0.25% <br /> along shorelines where desirable plants may be present, volume/volume(v/v)or higher(see manufacturer's label)of <br /> use caution to avoid spray contact with their foliage or the spray solution (0.25%v/v is equivalent to 1 quart in <br /> spray application to the soil in which they are rooted. 100 gallons). For best results, select a nonionic surfactant <br /> Shoreline plants that have roots which extend into the with a hydrophilic-to-lipophilic balance(HLB) ratio between <br /> water in an area where Arsenal has been applied generally 12 and 17 with at least 70% surfactant in the formulated <br /> will not be adversely affected by uptake of the herbicide product.Alcohol,fatty acid, oil, ethylene glycol, or <br /> from the water. diethylene glycol should not be considered as surfactants <br /> If treated vegetation is to be removed from the application to meet the above requirements. <br /> site, DO NOT use the vegetative matter as mulch or com- Methylated Seed Oil or Vegetable Oil <br /> post on or around desirable species. Concentrate <br /> Managing Off-target Movement Instead of a surfactant, a methylated seed oil(MSO)or <br /> Aerial Application vegetable-based seed oil concentrate may be used at the <br /> •Applicators are required to use a coarse or coarser rate of 1.5 to 2 pints per acre.When using spray volumes <br /> greater than 30 gallons per acre, mix MSO or vegetable- <br /> droplet size(ASABE S572)or, if specifically using aspin- based seed oil concentrates at a rate of 1% of total spray <br /> Wing atomizer nozzle, applicators are required to use a volume, or alternatively use a nonionic surfactant as <br /> volume mean diameter(VIVID)of 385 microns or greater described above. Research indicates that these oils may <br /> for release heights below 10 feet.Applicators are aid in Arsenal deposition and uptake by plants under <br /> required to use a very coarse or coarser droplet size or, if moisture or temperature stress. <br /> specifically using a spinning atomizer nozzle, applicators <br /> are required to use a VIVID of 475 microns or greater for Silicone-based Surfactant <br /> release heights above 10 feet.Applicators must consider <br /> the effects of nozzle orientation and flight speed when See manufacturer's label for specific rates. Silicone-based <br /> determining droplet size, surfactants may reduce the surface tension of the spray <br /> • Applicators are required to use upwind swath droplet allowing greater spreading on the leaf surface as <br /> displacement. compared to conventional nonionic surfactants. However, <br /> •The boom length must not exceed 60% of the wingspan some silicone-based surfactants may dry too quickly, limit- <br /> or 90% of the rotor-blade diameter to reduce spray drift. ing herbicide uptake. <br /> •Applications with wind speeds less than 3 mph and with Invert Emulsions <br /> wind speeds greater than 10 mph are prohibited. <br /> •Applications into temperature inversions are prohibited. Arsenal can be applied as an invert emulsion.The spray <br /> solution results in an invert(water-in-oil) spray emulsion <br /> Ground Boom Application designed to minimize spray drift and spray runoff, resulting <br /> •Applicators are required to use a nozzle height below in more herbicide on the target foliage.The spray emulsion <br /> 4 feet above the ground or plant canopy and coarse or may be formed in a single tank(batch mixing)or injected <br /> coarser droplet size(ASABE S572)or, if specifically using (in-line mixing). Consult the invert chemical label for proper <br /> a spinning atomizer nozzle, applicators are required to mixing directions. <br /> use a volume mean diameter(VIVID)of 385 microns or Other <br /> greater. <br /> •Applications with wind speeds greater than 10 mph are An antifoaming agent, spray pattern indicator, or drift- <br /> prohibited. reducing agent may be applied at the product labeled rate <br /> •Applications into temperature inversions are prohibited. if necessary or desired. <br /> Wind Erosion Tank Mixes <br /> Avoid treating powdery, dry, or light sandy soils when con- <br /> ditions are favorable for wind erosion. Under these Arsenal may be tank mixed with other herbicides. <br /> conditions, the soil surface should first be settled by rainfall Consult manufacturer's labels for specific rate restrictions <br /> or irrigation, and weeds controlled. Always follow the more restrictive <br /> label restrictions and precautions for all products used <br /> when making an application involving tank mixes. <br /> 6 <br />