Urea ammonium nitrate as the carrier for preplant burndown herbicides

Mookodi, Kaone L.; Spackman, Jared A.; Adjesiwor, Albert T.

doi:10.1002/agg2.20404

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…), common lambsquarters (Chenopodium album L.), kochia (Bassia scoparia [L.] A.J. Scott), and redroot pigweed (Amaranthus retroflexus L.), respectively, 1 wk after application (Mookodi et al, 2023). Tiafenacil applied at 50 g ai ha -1 alone resulted in 82% control of glyphosate-resistant downy brome (Bromus tectorum L.) (Geddes and Pittman, 2023) 7 d after treatment (DAT), whereas the same rate co-applied with metribuzin at 400 g ai ha -1 resulted in 88% control of glyphosate-resistant horseweed (Erigeron canadensis L.) (Westerveld et al, 2021b).…”

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confidence: 99%

Impact of Reduced Rates of Tiafenacil on Early-Season Cotton (Gossypium hirsutum L.) Growth and Yield

Miller,

Barber,

Bond

et al. 2024

JCS

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Tiafenacil is a new nonselective protoporphyrinogen IX oxidase-inhibiting herbicide with both grass and broadleaf activity labeled for preplant application to corn, cotton, soybean, and wheat. Early-season cotton emergence and growth often coincides in the Mid-South with preplant herbicide application in later planted cotton and soybean, thereby increasing opportunity for off-target herbicide movement from adjacent fields. Field studies were conducted in 2022 to identify any deleterious impacts of reduced rates of tiafenacil (12.5 – 0.4% of the lowest labeled application rate of 24.64 g ai ha-1) applied to one- to two-leaf cotton. Visual injury one week after treatment (WAT) with 1/8, 1/16, 1/32, and 1/64x rate of tiafenacil was 72, 54, 36, and 22%, respectively, whereas at four WAT these respective rates resulted in visual injury of 73, 67, 48, and 20%. Tiafenacil at these rates reduced cotton height 26 to 38% and 12 to 36% one and four WAT and seed cotton yield reduced 58, 38, 20, and 9%. Application of tiafenacil directly adjacent to cotton in early vegetative growth should be avoided as severe visual injury will occur. In cases where off-target movement occurs, impacted cotton should not be expected to recover fully and negative impact on growth and yield will be observed.

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confidence: 99%

Impact of Reduced Rates of Tiafenacil on Early-Season Cotton (Gossypium hirsutum L.) Growth and Yield

Miller,

Barber,

Bond

et al. 2024

JCS

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Response of corn to reduced rates of tiafenacil applied at vegetative growth stages

Miller,

Barber,

Bond

et al. 2024

Weed Technol

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Tiafenacil is a new nonselective protoporphyrinogen IX oxidase (PPO)–inhibiting herbicide with both grass and broadleaf activity labeled for preplant application to corn, cotton, soybean, and wheat. Early-season corn emergence and growth often coincides in the mid-South with preplant herbicide application in cotton and soybean, thereby increasing opportunity for off-target herbicide movement from adjacent fields. Field studies were conducted in 2022 to identify the impacts of reduced rates of tiafenacil (12.5% to 0.4% of the lowest labeled application rate of 24.64 g ai ha–1) applied to two- or four-leaf corn. Corn injury 1 wk after treatment (WAT) for the two- and four-leaf growth stages ranged from 31% to 6% and 37% to 9%, respectively, whereas at 2 WAT these respective ranges were 21.7% to 4% and 22.5% to 7.2%. By 4 WAT, visible injury following the two- and four-leaf exposure timing was no greater than 8% in all instances except the highest tiafenacil rate applied at the four-leaf growth stage (13%). Tiafenacil had no negative season-long impact, as the early-season injury observed was not manifested in a reduction in corn height 2 WAT or yield. Application of tiafenacil directly adjacent to corn in early vegetative stages of growth should be avoided. In cases where off-target movement does occur, however, affected corn should be expected to fully recover with no impact on growth and yield, assuming adequate growing conditions and agronomic/pest management practices are provided.

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Impact of reduced rates of tiafenacil at vegetative growth stages on soybean growth and yield

Miller,

Bond,

Butts

et al. 2024

Weed Sci

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Tiafenacil is a new non-selective protoporphyrinogen IX oxidase (PPO)-inhibiting herbicide with both grass and broadleaf activity labeled for preplant application to corn (Zea mays L.), cotton (Gossypium hirsutum L.), soybean [Glycine max (L.) Merr.], and wheat (Triticum aestivum L.). Early-season soybean emergence and growth often coincide in the U.S. Midsouth with preplant herbicide application in later-planted cotton and soybean, thereby increasing opportunity for off-target herbicide movement from adjacent fields. Field studies were conducted in 2022 to identify any deleterious impacts of reduced rates of tiafenacil (12.5% to 0.4% of the lowest labeled application rate of 24.64 g ai ha−1) applied to 1- to 2-leaf soybean. Visual injury at 1 wk after treatment (WAT) with 1/8×, 1/16×, 1/32×, and 1/64× rate of tiafenacil was 80%, 61%, 39%, and 21%, while at 4 WAT, these respective rates resulted in visual injury of 67%, 33%, 14%, and 4%. Tiafenacil at these respective rates reduced soybean height 55% to 2% and 53% to 5% at 1 and 4 WAT and soybean yield 53%, 24%, 5%, and 1%. Application of tiafenacil directly adjacent to soybean in early vegetative growth should be avoided, as severe visual injury will occur. In cases where off-target movement does occur, impacted soybean should not be expected to fully recover, and negative impact on growth and yield will be observed.

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Urea ammonium nitrate as the carrier for preplant burndown herbicides

Cited by 4 publications

References 13 publications

Impact of Reduced Rates of Tiafenacil on Early-Season Cotton (Gossypium hirsutum L.) Growth and Yield

Impact of Reduced Rates of Tiafenacil on Early-Season Cotton (Gossypium hirsutum L.) Growth and Yield

Response of corn to reduced rates of tiafenacil applied at vegetative growth stages

Impact of reduced rates of tiafenacil at vegetative growth stages on soybean growth and yield

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