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Arsenal: imazapyr

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 21 January 2008
Pub 75: Guide to Weed Control > Notes on Herbicides > Arsenal: imazapyr
Excerpt from Chapter 4, Publication 75, Guide to Weed Control, Order this publication
Trade Names
Arsenal
Formulation Sn
Guaranteed active concentration 240 g/L
Groups  2
Ontario Schedule 2
Winter Storage B
Chemical Family Imidazolinone
Crop and/or Non-Crop Registrations Non-crop/non-graze areas such as industrial sites, railroad ballast, spot treatments for rail and highway rights-of-way and pipeline rights-of-way stations including well sites, battery stations and compressor or valve stations.
Sensitive Weeds Annual and perennial grass and broadleaf weeds such as: annual - black medick, rough cinquefoil, common groundsel, hemp-nettle, kochia, lamb's-quarters, mustard spp., pigweed spp., pineappleweed, ragweed spp., Russian thistle, stinkweed, annual sow-thistle, wild buckwheat, annual bluegrass, foxtail spp., witch grass; biennial/perennial - bladder campion, bull thistle, burdock, Canada thistle, sulfur cinquefoil, clover spp., dandelion, dog-strangling vine, field bindweed, goat's beard, goldenrod, leafy spurge, milkweed, mouse-eared chickweed, mullein spp., ox-eye daisy, plantain spp., poison-ivy, sheep sorrel, toadflax, tufted vetch, wild carrot, wild grape, wild strawberry, brome grass, Canada bluegrass, fescue spp., quack grass, yellow nut sedge; Seedling woody species - maple, poplar, raspberry and wild rose.
Uptake and Translocation Absorbed by both roots and foliage of sensitive vegetation. Translocated in both the xylem and phloem.
Basis of Selectivity  None
Application Methods Postemergence on actively growing weeds. Control of non-emerged sensitive species will also be provided in the year of application. Apply in 100-550 L of water/ha with high-volume, high-pressure handguns and vehicle-mounted directed-spray equipment or conventional boom-mounted, manifold-mounted or off-centred nozzles. Low-volume, hand-held backpacks, knapsacks or other pump-up-type sprayers may also be used for direct applications to foliage. Addition of non-ionic surfactant at 1 L/400 L of spray solution is recommended for spray volumes greater than 550 L/ha. A foam-reducing agent may be added at the recommended rate, if required.
Residual Activity Season-long control of sensitive species.
Unique Characteristics Do not contaminate ponds, lakes, streams, wetlands or sloughs and do not apply within 15 m of a wetland area or body of water. Do not mix or store in unlined steel (except stainless steel) containers or spray tanks. For ground application only. Do not use where roots from desirable vegetation may extend into the treated area (maintain a distance from desirable trees equal to at least twice the distance from the trunk to the dripline). To be used by licensed applicators only.
Manufacturer / Registrant BASF Canada Inc.

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