Response of Wine Grape Cultivars to Simulated Drift Rates of 2,4-D, Dicamba, and Glyphosate, and 2,4-D or Dicamba Plus Glyphosate

Mohseni-Moghadam, Mohsen; Wolfe, Scott; Dami, Imed; Doohan, Douglas

doi:10.1614/wt-d-15-00106.1

Cited by 31 publications

(30 citation statements)

References 14 publications

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“…Herbicide spray particles, notably those of the phenoxyacetic acid group, can drift several kilometres off‐target particularly under conditions of high temperature, low relative humidity and prevailing winds (Felsot et al ). The effect of different drift rates of herbicides, such as 2,4‐dichlorophenoxyacetic acid (2,4‐D) and glyphosate, on visual grapevine injuries, leaf area and pruning mass, have been widely studied (Al‐Khatib et al , Bhatti et al , , Mohseni‐Moghadam et al ). Furthermore, the repercussions of 2,4‐D exposure on grapevine fruit yield and basic grape composition (Ogg et al ), as well as leaf morphoanatomy (Bondada ), have been described.…”

Section: Introductionmentioning

confidence: 99%

“…The systemic nature and phloem mobility of the auxin‐type herbicides mean that the active constituents are readily translocated to tissues undergoing rapid growth (Sterling and Hall ). Therefore, depending on the time of exposure and drift rate, grapevine shoot growth (Bhatti et al , Mohseni‐Moghadam et al ) and fruit yield (Ogg et al ) can be reduced after exposure to these herbicides. The underlying physiological mechanisms inducing grapevine injuries, however, especially in terms of supressed reproductive development, are still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

“…Only a limited number of studies have assessed the consequences of herbicides on grapevine performance (physiology and productivity) (e.g. Ogg et al , Bhatti et al , Mohseni‐Moghadam et al ) despite an ever‐increasing use of herbicides world‐wide. Canopy functioning (leaf area and carbon assimilation) plays a vital role in grapevine productivity, affecting the efficiency of key processes, such as shoot growth, fruit sugar accumulation and late season carbohydrate reserve replenishment (Holzapfel et al , Rossouw et al ).…”

Section: Introductionmentioning

confidence: 99%

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Repercussions of four herbicides on reproductive and vegetative development in potted grapevines

Rossouw

Holzapfel

Rogiers

et al. 2019

Australian Journal of Grape and Wine Research

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Background and Aims Spring drift of herbicides can have devastating consequences on grapevines. The impact of 2,4‐dichlorophenoxyacetic acid (2,4‐D), dichloro‐2‐methoxybenzoic acid (Dicamba), 2‐methyl‐4‐chlorophenoxyacetic acid (MCPA) and glyphosate exposure on reproductive and vegetative development was investigated. Methods and Results Simulated herbicide drifts were applied to potted vines at the cessation of flowering. Leaf gas exchange and biomass, root structural biomass and carbohydrate reserves, fruit yield and compound bud necrosis were assessed, along with berry composition, including the primary metabolites, at fruit maturity. Fruit yield was reduced by 2,4‐D without any detriment to most aspects of berry composition. While root structural development was curtailed by 2,4‐D, Dicamba and MCPA, none of the herbicides altered the reserve level of root total non‐structural carbohydrates. Primary bud necrosis was evident following 2,4‐D and Dicamba exposure, especially in younger buds. Conclusions Exposure to 2,4‐D may be particularly damaging to fruit yield during the current season because of an increased risk of bunch necrosis. Bud fruitfulness can be impaired by 2,4‐D and Dicamba because of the increased potential for primary bud necrosis. Significance of the Study Auxin‐type herbicides can limit fruit yield during the current and next season. Compared to cane pruning, spur pruning may minimise the detrimental effects of these herbicides on fruitfulness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Repercussions of four herbicides on reproductive and vegetative development in potted grapevines

Rossouw

Holzapfel

Rogiers

et al. 2019

Australian Journal of Grape and Wine Research

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“…Mohseni-Moghadam et al (2016) observed injury symptoms greater than 10% 42 d after treatment (DAT) in wine grapes (Vitis vinifera) treated with 2,4-D at all rates examined and with dicamba at the highest rates. Injury levels of 35% were observed at 357 DAT only in plants treated with the highest rate of 2,4-D (Mohseni-Moghadam et al, 2016). Dicamba and 2,4-D are translocated by symplastic and apoplastic pathways and accumulate at the growing points of plants (Shaner, 2014).…”

Section: Resultsmentioning

confidence: 94%

Simulated Single Drift Events of 2,4-D and Dicamba on Pecan Trees

Wells

Prostko

Carter

2019

hortte

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A large number of agronomic and horticultural crops are susceptible to injury and yield loss from drift-level exposures to synthetic auxin herbicides. A new generation of genetically modified crops including cotton (Gossypium hirsutum), field corn (Zea mays), soybean (Glycine max), and canola (Brassica napus) with resistance to dicamba and 2,4-D herbicides has been developed to address the problem of glyphosate-resistant weeds. In the few years since their commercial introduction, these technologies have been rapidly adopted. The objective of this study was to determine the potential effects of simulated, single drift events of 2,4-D and dicamba on pecan (Carya illinoinensis) trees. 2,4-D amine [3.8 lb/gal acid equivalent (a.e.)] or dicamba-Diglycolamine salt (4.0 lb/gal a.e.) were applied in 1.0%, 0.1%, and 0.01% by volume spray solutions to pecan trees in June 2013. In 2016 and 2017, 2,4-D choline (3.8 lb/gal a.e.) or dicamba-N,N-Bis-(3-aminopropyl) methylamine (5.0 lb/gal a.e.) were applied in 1.0%, 0.1%, and 0.01% by volume spray solutions to pecan trees in May. These results suggest that serious injury can occur to pecan trees receiving a drift application of 1.0% by volume dicamba or 2,4-D. This injury includes deformed foliage, dead foliage, dead limbs, and/or branches, and arrested nut development. There were no major differences in the response of pecan to either dicamba or 2,4-D at similar rates in this study. Pecan damage resulting from off-target movement of 2,4-D and dicamba at rates ≥1% by volume has the potential to cause significant injury. Yield was not negatively affected by any of the treatments, suggesting that pecan trees can compensate for the observed injury to some extent. The effect of treatments on percent kernel was variable.

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“…A risk commonly associated with dicamba and 2,4-D applications is injury from drift onto many different broadleaf crops (Al-Khatib and Peterson 1999;Colquhoun et al 2014;Everitt and Keeling 2009;Gilreath et al 2001;Hatterman-Valenti et al 2017;Johnson et al 2012;Marple et al 2008;Mohseni-Moghadam and Doohan 2015;Mohseni-Moghadam et al 2016). Use of PGRresistant soybean technologies will most likely increase the use of dicamba and 2,4-D during the growing season (Mortensen et al 2012), which may also increase injury risks to other broadleaf crops grown in close proximity.…”

Section: Introductionmentioning

confidence: 99%

Evaluating risks of plant growth regulator–resistant soybean technologies to horseradish production

et al. 2019

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Off-target movement of dicamba and 2,4-D may injure and reduce the yield of many fruit and vegetable crops, impacting specialty crop producers and herbicide applicators alike. Two field experiments were established, using plant growth regulator–resistant soybean herbicide technologies, to evaluate drift and carryover risks to horseradish production. The drift experiment was conducted in 2015 and 2016 to evaluate impact of dicamba and 2,4-D simulated drift on horseradish production with a mid-POST application in soybean. Simulated drift rates were 1/10,000X, 1/1,000X, and 1/100X, with 1/2X, 1X, and 2X of standard application rates. Injury and yield loss was greater following application of 2,4-D than with dicamba. Yield reductions were observed beginning at the 1/1,000X rate of 2,4-D, with complete crop loss occurring when rates exceed 1/2X. In comparison, dicamba only reduced yields when applied at the 1X and 2X rates. Only horseradish roots from plants treated with dicamba at the 2X rate had greater dicamba residue than the nontreated control, and the amount detected, 0.32 parts per billion (ppb), was lower than the EPA tolerance of 100 ppb in root crops. There was little to no harvestable tissue for 2,4-D residue analysis for plants treated with 2,4-D at rates above 1/2X. The carryover experiment was a 2-yr rotational evaluation conducted in 2014, 2015, and 2016 to assess dicamba carryover to horseradish following application to dicamba-resistant soybean the previous season. Observations taken at 4, 6, and 8 wk after planting indicated no significant horseradish injury, nor was height, stand, or root weight reduced. These results suggest that horseradish growers should have few concerns about injury from dicamba drift or carryover. While 2,4-D applicators may need to be cautious when making applications near horseradish fields, 2,4-D may be an effective tool for controlling volunteer horseradish in 2,4-D–resistant soybean.

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Response of Wine Grape Cultivars to Simulated Drift Rates of 2,4-D, Dicamba, and Glyphosate, and 2,4-D or Dicamba Plus Glyphosate

Cited by 31 publications

References 14 publications

Repercussions of four herbicides on reproductive and vegetative development in potted grapevines

Repercussions of four herbicides on reproductive and vegetative development in potted grapevines

Simulated Single Drift Events of 2,4-D and Dicamba on Pecan Trees

Evaluating risks of plant growth regulator–resistant soybean technologies to horseradish production

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