Peanut (Arachis hypogea) Response to Low Rates of Dicamba at Reproductive Growth Stages

Seale, John W.; Bararpour, Taghi; Bond, Jason A.; Gore, Jeffrey; Golden, Bobby R.

doi:10.3390/agriculture10090408

Cited by 2 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results are consistent with those reported by Seale et al. (2020), which indicated a 14% reduction in peanut canopy width following exposure to dicamba at 1/32X (17.5 g ae ha −1 ) recommended rate of 560 g ae ha −1 at R1 (beginning of boom) growth stage. In the present study, the highest reduction in canopy height (31%) and width (32%) was recorded with dicamba plus glyphosate at 1/8X rate and were about three times greater compared to the 1/32X rate.…”

Section: Resultssupporting

confidence: 93%

“…In a study evaluating peanut response to low rates of dicamba at reproductive growth stages, Seale et al. (2020) observed greater canopy width reduction with dicamba applied at 1/16X (35 g ae ha −1 ) and 1/32X (17.5 g ae ha −1 ) recommended rate of 560 g ae ha −1 during the R1 (beginning of bloom) stage compared to R2 (beginning peg) and R3 (beginning pod) growth stages. Dicamba plus glyphosate rates affected peanut canopy height and width at 4 WAT (Table 3).…”

Section: Resultsmentioning

confidence: 99%

“…In a similar study conducted on soybean, Osipitan et al (2019) reported reduced canopy height as much as 46% following exposure to dicamba at 1/10X the label rate of 560 g ae ha −1 at V2 (seventh trifoliate/vegetative stage) compared with 21% reduction at R2 (full flowering stage) exposure timing. In a study evaluating peanut response to low rates of dicamba at reproductive growth stages, Seale et al (2020) observed greater canopy width reduction with dicamba applied at 1/16X (35 g ae ha −1 ) and 1/32X (17.5 g ae ha −1 ) recommended rate of 560 g ae ha −1 during the R1 (beginning of bloom) stage compared to R2 (beginning peg) and R3 (beginning pod) growth stages. Dicamba plus glyphosate rates affected peanut canopy height and width at 4 WAT (Table 3).…”

Section: Peanut Canopy Height and Width Reductionmentioning

confidence: 99%

“…The canopy height and width of peanuts exposed to dicamba plus glyphosate at 25 DAP were about 75% of untreated peanuts. Synthetic auxin herbicides such as dicamba have been reported to cause a reduction in plant growth, particularly the leaves, petioles, and apical meristem in susceptible crops (McCown et al, 2018;Osipitan et al, 2019;Seale et al, 2020). Griffin et al (2013) reported a 32% reduction in the height of soybean following exposure to dicamba (70 g ae ha −1 ) at the vegetative (V3/V4) growth stage.…”

Section: Peanut Canopy Height and Width Reductionmentioning

confidence: 99%

See 3 more Smart Citations

Response of peanut (Arachis hypogaea L.) to sublethal rates of dicamba plus glyphosate at different growth stages

et al. 2023

View full text Add to dashboard Cite

The widespread adoption of dicamba-resistant crops has increased the applications of newer dicamba formulations for weed control. However, there is a concern for potential off-target injury and yield reduction to peanuts (Arachis hypogea L.) planted in close proximity to dicamba-resistant crops. Field experiments were conducted in the summer of 2019 and 2020 to evaluate peanut response to reduced rates (1/512X, 1/128X, 1/32X, and 1/8X the label rate, 564 + 1280 g ae ha −1 ) of dicamba plus glyphosate (XtendiMax plus Roundup PowerMax) at 25, 50, and 75 days after planting (DAP) which corresponds to vegetative, flowering, and pod development stages, respectively. Peanut exposure to dicamba plus glyphosate at 25 DAP resulted in 1.6-2.3 times greater injury and 3.4-8.5 times greater height and canopy width reductions compared to 50 and 75 DAP exposures. Peanuts suffered greater yield reduction (18%-19%) when exposed to dicamba plus glyphosate at 25 and 75 DAP than at 50 DAP (10%). Regression analysis indicated a significant linear response for peanut injury (except at 8 weeks after treatment), canopy width reduction, and yield reduction with an increasing rate of dicamba plus glyphosate. Dicamba plus glyphosate at 1/512X rate resulted in a 3% peanut yield reduction, whereas a 41% yield reduction was observed at 1/8X rate. Correlation analysis, with Pearson's rho values ranging from 0.81 to 0.86, showed that peanut injury can be a useful predictor for estimating yield reduction. Therefore, extreme care must be taken to prevent drift occurrence or spray-tank contamination when applying dicamba plus glyphosate on XtendFlex crops near peanut fields. INTRODUCTIONPeanut (Arachis hypogaea L.) is one of the major agronomic crops in the southeastern United States. In 2020, peanut was planted on 673,477 ha with 2.8 million metric tons of production, resulting in a total market value Abbreviations: DAP, days after planting; VGT, vapor grip technology; WAP, weeks after planting; WAT, weeks after treatment.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Peanut Canopy Height and Width Reductionmentioning

confidence: 99%

Section: Peanut Canopy Height and Width Reductionmentioning

confidence: 99%

See 2 more Smart Citations

Response of peanut (Arachis hypogaea L.) to sublethal rates of dicamba plus glyphosate at different growth stages

et al. 2023

View full text Add to dashboard Cite

show abstract

“…However, glufosinate applied at 302 g ha -1 caused a 35% reduction in peanut canopy height at 4 WAT (Table 5). Similar peanut height reductions have been reported from other herbicides such as dicamba (Seale et al 2020), 2,4-D (Blanchett et al 2017), and glyphosate plus dicamba (Daramola et al 2023b).…”

Section: Resultssupporting

confidence: 75%

Growth and yield response of peanut to simulated drift of glufosinate at vegetative and reproductive growth stages

Daramola,

Singh,

Iboyi

et al. 2023

Weed Technol

View full text Add to dashboard Cite

The increased incidence of glyphosate-resistant weeds has led to an exponential increase in the use of glufosinate in glufosinate-resistant corn, cotton, and soybean. Field experiments were conducted in 2021 and 2022 to evaluate peanut response to glufosinate at 25 and 60 d after planting, corresponding to vegetative (V3) and reproductive (R4) growth stages, at 1.2, 4.7, 18.9, 75.5, and 302 g ai ha-1 representing 1/514 to 1/2 of the labeled rate of 604 g ha-1. Peanut injury and canopy and yield reductions from glufosinate were <10% when applied at 1.2, 4.7, and 18.9 g ha-1. However, at 75.5 and 302 g ha-1 peanut injury ranged from 24% to 72% for V3 exposure timing and 33% to 54% for R4 exposure timing. Similarly, glufosinate at 75.5 and 302 g ha-1 reduced peanut canopy width by 10% to 23% for V3 exposure timing and 43% to 57% for R4 exposure timing. Averaged across exposure timing, peanut yield was reduced by 15% and 61% at 75.5 and 302 g ha-1, respectively. Averaged across rates, peanut yield reduction was 18% for V3 exposure timing, with glufosinate at 298 g ha-1 required to cause an estimated 50% reduction in yield. For R3 exposure timing, peanut yield reduction was 20%, with glufosinate at 243 g ha-1 required to cause an estimated 50% reduction in yield. There was no difference in Normalized Difference Vegetative Index (NDVI) between untreated plants and peanut exposed to glufosinate at 1.2, 4.7, and 18.9 g ha-1. However, peanut exposed to glufosinate at 75.5 and 302 g ha-1 were distinguished from untreated plants with lower NDVI values. Based on Pearson’s Rho correlation coefficient, the best timing for assessing potential yield reduction based on injury was between 2 and 4 wk after treatment.

show abstract

Peanut (Arachis hypogea) Response to Low Rates of Dicamba at Reproductive Growth Stages

Cited by 2 publications

References 21 publications

Response of peanut (Arachis hypogaea L.) to sublethal rates of dicamba plus glyphosate at different growth stages

Response of peanut (Arachis hypogaea L.) to sublethal rates of dicamba plus glyphosate at different growth stages

Growth and yield response of peanut to simulated drift of glufosinate at vegetative and reproductive growth stages

Contact Info

Product

Resources

About