PRE herbicides influence critical time of weed removal in glyphosate-resistant corn

Ulusoy, Ayse Nur; Osipitan, O. Adewale; Scott, Jon E.; Jhala, Amit J.; Lawrence, Nevin C.; Knežević, Stevan Z.

doi:10.1017/wet.2020.105

Cited by 4 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our study, the plots with PRE herbicides across years had a lower number of weeds compared to plots without PRE herbicides, due to the effectiveness of herbicides, which was confirmed in many studies [51][52][53].…”

Section: Discussionsupporting

confidence: 85%

Critical Time for Weed Removal in Corn as Influenced by Planting Pattern and PRE Herbicides

et al. 2021

View full text Add to dashboard Cite

Determining the critical time for weed removal (CTWR) is essential for the development of an integrated weed management plan. Therefore, field experiments were conducted to evaluate the effects of two planting patterns (standard and twin-row) with and without PRE-applied herbicides on CTWR in corn. Experiments were laid out in a split-plot arrangement with two main plots: (i) standard row planting (SRP) that is 70 cm wide, and (ii) twin-row planting (TRP) with 50 cm distance between each set of double rows. Each main plot was divided into two sub-plots (with and without PRE herbicides). The sub-sub-plots consisted of seven weed removal timings for PRE herbicides, and tank mixes were utilized (S-metolachlor (1.44 kg a.i. ha−1) + terbutylazine (0.75 kg a.i. ha−1)). The CTWR without PRE herbicides was similar in both the SRP and TRP systems, where it was around the V1 to V2 (16 to 19 d after emergence (DAE)) growth stages. The use of PRE-applied herbicides delayed CTWR in SRP to the V4 to V10 (25 to 58 DAE) stages and up to the V11 (60 DAE) stage in TRP. These results clearly indicate that PRE herbicides are important for protecting corn yields regardless of the planting pattern. In more meteorologically favorable seasons (sufficient heat and precipitation) in both sowing systems, corn plants produce their biological maximum with the fact that over the number of plants per unit area (SRP = 80,000 plants ha−1, TRP = 93,900 plants ha−1) provide higher yields in variants with PRE herbicides, and thus the advantage of the TRP system can be justified.

show abstract

Section: Discussionsupporting

confidence: 85%

Critical Time for Weed Removal in Corn as Influenced by Planting Pattern and PRE Herbicides

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Pre-emergent herbicides also shortened the CPWC in other crops. In maize, the application of saflufenacil + dimethenamid-P + pyroxasulfone decreased CPWC in 26 days (Ulusoy et al, 2021), atrazine + s-metolachlor in 53 days in popcorn (Barnes et al, 2019), and in beans (Phaseolus vulgaris), with a reduction of 47 days by the application of the mixture of pendimethalin + dimethenamid-P (Beiermann et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Shortening critical period of weed control at soybean by residual herbicide mixtures

Roncatto,

Barroso,

Albrecht

et al. 2023

Advances in Weed Science

View full text Add to dashboard Cite

“…The application of soil-active preemergence herbicides delays weed emergence, in comparison to cropping systems utilizing only postemergence-applied herbicides, and can therefore affect the CTWR (Barnes et al 2019). Soil-active preemergence-applied herbicides have shown to delay the CTWR in corn (Ulusoy et al 2020), soybean (Knezevic et al 2019), and popcorn (Barnes et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Critical timing of weed removal in dry bean as influenced by the use of preemergence herbicides

et al. 2021

Self Cite

View full text Add to dashboard Cite

The critical timing of weed removal (CTWR) is the point in crop development when weed control must be initiated to prevent crop yield loss due to weed competition. A field study was conducted in 2018 and 2020 near Scottsbluff, NE to determine how the use of preemergence herbicides impacts the CTWR in dry bean. The experiment was arranged as a split-plot, with herbicide treatment and weed removal timing as main and sub plot factors, respectively. Herbicide treatment consisted of no-preemergence, or pendimethalin (1070 g ai ha–1) + dimethenamid-P (790 g ai ha–1) applied preemergence. Sub-plot treatments included season-long weed-free, weed removal at: V1, V3, V6, R2, and R5 dry bean growth stages, and a season-long weedy control. A four-parameter logistic model was used to estimate the impact of time of weed removal, for all response variables including dry bean yield, dry bean plants m–1 row, pods plant–1, seeds pod–1, and seed weight. The CTWR based on 5% yield reduction was estimated to range from the V1 growth stage [(16 d after emergence (DAE)] to the R1 growth stage (39 DAE) in the no-PRE herbicide treatment. In the PRE-applied treatment, the CTWR began at the R2 growth stage (47 DAE). Dry bean plants m–1 row was reduced in the no-preemergence treatment when weed removal was delayed beyond the R2 growth stage in the 2020 field season. The use of preemergence-applied herbicides prevented a reduction in the number of pods plant–1 in 2020, and the number of seeds pod–1 in 2018 and 2020. In 2018, the number of pods plant–1 was reduced by 73% when no-preemergence was applied, compared to 26% in the preemergence-applied treatment. The use of preemergence-applied soil active herbicides in dry bean delayed the CTWR and preserved yield potential.

show abstract

PRE herbicides influence critical time of weed removal in glyphosate-resistant corn

Cited by 4 publications

References 40 publications

Critical Time for Weed Removal in Corn as Influenced by Planting Pattern and PRE Herbicides

Critical Time for Weed Removal in Corn as Influenced by Planting Pattern and PRE Herbicides

Shortening critical period of weed control at soybean by residual herbicide mixtures

Critical timing of weed removal in dry bean as influenced by the use of preemergence herbicides

Contact Info

Product

Resources

About