Imprelis 2SL Crabgrass and Broadleaf Weed Efficacy and Seedling Tolerance

Blume, Christopher; Christians, Nick E.; Hoiberg, Andrew H.; Minner, David D.

doi:10.31274/farmprogressreports-180814-858

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“…Interestingly, aminocyclopyrachlor was considered a POST broadleaf herbicide and still reduced crabgrass cover to 32% when applied 2 WAE. Similar results occurred in early findings from Blume et al (8) who found slight reductions in crabgrass from aminocyclopyrachlor applications over newly‐seeded KBG. Establishment of KBG in Indiana was poor with only three treatments providing >7% KBG cover by 8 WAE led by siduron applied AS (38%) and mesotrione applied AS (17%) or 0 WAE (19%) (Table 5).…”

Section: Effects Of Single Herbicide Applications At Three Timings Atsupporting

confidence: 89%

Weed Control and Turf Safety of Single and Sequential Applications of Herbicides Over Spring Seedings

Sousek

Gaussoin

Patton

et al. 2014

Applied Turfgrass Science

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Weed control is important during establishment of cool‐season grasses, especially when seeded in spring near summer annual weed germination. Our objectives were to determine (i) turf safety and weed control from sequential applications of newly‐released herbicides on tall fescue at three seeding dates (May, June, July) and (ii) turf safety and weed control from newly‐released herbicides applied at seeding or shortly after emergence of spring‐seeded Kentucky bluegrass or tall fescue. No herbicides tested negatively affected turfgrass establishment and usually improved turf establishment by reducing weed competition. Mesotrione consistently provided effective weed control and turf cover from either single or sequential applications over different locations, years, seeding dates, and turf species. Quinclorac or siduron applied as single or sequential applications or quinclorac+carfentrazone as a single application provided effective weed control and turf cover depending on seeding date and application regime. Although spring seeding can be achieved with high maintenance, it is strongly recommended to seed cool season grasses at the optimal time from late summer to early fall.

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Section: Effects Of Single Herbicide Applications At Three Timings Atsupporting

confidence: 89%