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Chavers Mining Resource Integrated Noxious Weed Management Plan January 2024 Page 10 Broadleaf selective herbicides (such as 2,4-D) can either be applied by spot spraying individual plants or by a continuous spray over an entire area.A non-selective herbicide(such as glyphosate) should only be used if spot spraying. Avoid using soil-active herbicides (such as dicamba) near windbreak plants or other desirable woody vegetation. Plant injury or death can occur. Also, do not allow any herbicide to drift onto desirable vegetation for the same reasons. From time to time, if possible,alternate the herbicide(active ingredient)applied to the noxious weed infestation. This will help to prevent the weeds from developing chemical resistance. For the first few years, spray twice per year: once in the spring and once in the fall. When you have achieved a more acceptable level of control,you can change to spraying only once in the fall. If it becomes economically unfeasible for you to spray twice a year,you may choose to only spray in the fall. From time to time, if possible, alternate the herbicide(active ingredient)you use. This will help to prevent the weeds from developing chemical resistance. When using a foliar spray, be sure to get good spray coverage of the plants. All the leaves should have herbicide contact. The sprayed plants should be obviously wet, but not dripping with herbicide. If a surfactant is indicated the herbicide label, it should be mixed as directed with the herbicide. Surfactants help herbicides do their job by reducing the surface tension of liquids between two liquids or a solid leaf. You may also choose to use an herbicide tracer dye so that you can easily see the areas you have treated. Calibrate the sprayer to the recommended application rate and keep records of the work performed. 5.3.1 SPRAY DRIFT MANAGEMENT Avoiding spray drift at the application site is the responsibility of the applicator. The interaction of many equipment and weather-related factors determine the potential for spray drift. The applicator and grower are responsible for considering all these factors when making decisions.The following drift management requirements must be followed to avoid off-target drift movement from aerial applications to agricultural field crops. These requirements do not apply to forestry applications, public health uses, or to applications using dry formulations. 1. The distance of the outermost nozzles on the boom must not exceed 3/4 the length of the wingspan or rotor. 2. Nozzles must always point backwards parallel with the airstream and never be pointed downwards more than 45 degrees. AERIAL DRIFT REDUCTION INFORMATION INFORMATION ON DROPLET SIZE The most effective way to reduce drift potential is to apply large droplets. The best drift management strategy is to apply the largest droplets that provide sufficient coverage and control. Applying larger droplets reduces drift potential but will not prevent drift if applications are made