Site Maintenance-Preemergence Control of Grass and Broadleaf Weeds

indaziflam (Rejuvra)

Rate 0.046 to 0.09 lb ai/A (3.5 to 7 oz/A Rejuvra). Use lower rates only where weed pressure is light and shorter period of residual activity is desired.

Time Apply at least several weeks prior to expected germination of targeted weeds. Apply to dry soils when rain is not expected for at least 48 hr. Can be successfully applied several months in advance of weed germination.

Remarks Indaziflam provides multiple years of pre-emergent control of germinating seeds of most species from a single application. Provides excellent control of winter annual grass weeds (e.g. cheatgrass, medusahead, feral rye, etc.). Indaziflam is safe over the top of most well-established perennial grasses, but see label for full details. Use only in areas in which desirable perennial grass stands are of adequate density to meet management goals for several years after application without any further plant recruitment. Do not expect to conduct successful seedings of desirable plants for several years after application. Pre-emergent activity only, use appropriate tank-mix partners if weeds have emerged prior to application. Does not control established perennial weeds.

Caution Adequate binding time on dry soil reduces risk of indaziflam moving into the root zone of desirable plants. Do not apply to or around water. Do not apply to saturated, frozen, or snow-covered ground. Do not harvest hay within 40 days of application. Do not exceed a maximum rate of 0.065 lb ai/A (5 oz/A Rejuvra) in a single application. On grazed areas, do not apply more than 0.078 lb ai/A (6 oz/A Rejuvra) in a 12-month period. Do not make more than 2 applications in a 12-month period. Allow at least 60 days between applications.

Site of action Group 29, inhibition of cellulose biosynthesis

Chemical family Alkylazine

flumioxazin (SureGuard)

Control of non-native grass and broadleaf weeds in native restoration habitats in order to enhance survival and growth of native woody tree and shrub species in riparian areas

Rate 0.375 lb ai/A (12 oz/A SureGuard)

Time Apply to dormant trees and shrubs; after transplanting or to established plants.

Remarks For use in conservation, restoration and related research projects. SLN OR-130006. Make application as a directed spray to the base of the plants. Avoid contact with green tissue. Plants must be at least one year from seedling at application. Newly transplanted trees and shrubs must be watered prior to application with a volume sufficient to settle the soil around the new transplant.

Caution While research has been conducted in Oregon to ensure tolerance to the listed plants when applied as directed, users are encouraged to test this use pattern on a small number of plants as growing conditions, plant varieties and localized conditions may cause differences in plant response.

Site of action Group 14: protoporphyrinogen oxidase (PPO) inhibitor

Chemical family Diphenylether