Spray particle drift mitigation using field corn (<scp><i>Zea mays</i></scp> L.) as a drift barrier

Vieira, Bruno C.; Butts, Thomas R.; Rodrigues, Andre O.; Golus, Jeffrey A.; Schroeder, Kasey; Kruger, Greg R.

doi:10.1002/ps.5041

Cited by 33 publications

(41 citation statements)

References 45 publications

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“…Herbicide drift from the flat fan nozzle resulted in 54-69% (CI 95%) overall mortality when the other variables were pooled, whereas the air inclusion nozzle resulted in 19 to 32% (CI 95%). These results corroborate previous field and wind tunnel results where applications with air inclusion nozzles resulted in less particle drift compared to flat fan nozzles [58][59][60][61][62] . The preorifice component of air inclusion nozzles is designed to reduce the solution pressure as it exits the nozzle, thereby increasing the droplet size of the spray and consequently reducing the drift potential 63,64 .…”

Section: Resultssupporting

confidence: 90%

“…Preventing the establishment of resistance prone weeds on field margins and ditches in agricultural landscapes is an important management strategy to delay herbicide resistance, especially for cross-pollinated weed species such as Palmer amaranth and waterhemp 16,75 . Weed management programs should consider strategies to mitigate near-field spray drift, and suppress weed populations on field borders and ditches in agricultural landscapes 16,62,75,76 . Figure 6.…”

Section: Populationmentioning

confidence: 99%

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Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Vieira

Luck

Amundsen

et al. 2020

Sci Rep

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While the introduction of herbicide tolerant crops provided growers new options to manage weeds, the widespread adoption of these herbicides increased the risk for herbicide spray drift to surrounding vegetation. the impact of herbicide drift in sensitive crops is extensively investigated, whereas scarce information is available on the consequences of herbicide drift in non-target plants. Weeds are often abundant in field margins and ditches surrounding agricultural landscapes. Repeated herbicide drift exposure to weeds could be detrimental to long-term management as numerous weeds evolved herbicide resistance following recurrent-selection with low herbicide rates. the objective of this study was to evaluate if glyphosate, 2,4-D, and dicamba spray drift could select Amaranthus spp. biotypes with reduced herbicide sensitivity. palmer amaranth and waterhemp populations were recurrently exposed to herbicide drift in a wind tunnel study over two generations. Seeds from survival plants were used for the subsequent rounds of herbicide drift exposure. progenies were subjected to herbicide doseresponse studies following drift selection. Herbicide drift exposure rapidly selected for Amaranthus spp. biotypes with reduced herbicide sensitivity over two generations. Weed management programs should consider strategies to mitigate near-field spray drift and suppress the establishment of resistance-prone weeds on field borders and ditches in agricultural landscapes.Some researchers also suggest that low rates of herbicides could induce new stress-related mutations and epigenetic alterations on weeds, ultimately leading to reduced herbicide sensitivity [33][34][35] .Recombination and accumulation of minor resistance alleles can occur at a faster rate in cross-pollinated species, such as Palmer amaranth and waterhemp, during recurrent selection with low rates of herbicides 21,22,36 . These C4 summer annual Amaranthus spp. are among the most troublesome weed species in the US row crop production systems 37 . Both are obligate outcrossing dioecious weed species with a fast growth habitat, extended emergence window, and prolific seed production with high genetic plasticity which pose a challenge to their management 37-44 . Numerous Palmer amaranth and waterhemp populations have evolved resistance to herbicides that target 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), 4-hydroxyphenylpyruvate dioxygenase (HPPD), photosystem II, protoporphyrinogen oxidase (PPO), auxin receptors, microtubule assembly, and acetolacte synthase (ALS) in the US 15,17,[45][46][47][48][49][50][51][52][53][54] . Moreover, pollen mediated gene flow has been reported as a major contributor to herbicide resistance dissemination in Palmer amaranth and waterhemp in the US Midwest 55,56 .Although controlling weed populations on field margins and ditches is considered a best management practice to delay herbicide resistance evolution, these weed populations are often neglected in agricultural landscapes [15][16][17]29 . The hypothesis of this study is that rep...

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Section: Resultssupporting

confidence: 90%

Section: Populationmentioning

confidence: 99%

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Vieira

Luck

Amundsen

et al. 2020

Sci Rep

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“…Spray drift mitigation efforts have primarily focused on increasing spray droplet size because finer droplets have been shown to drift further downwind (Bueno et al, 2017; Vieira et al, 2018). Numerous application factors have been determined to affect droplet size, including adjuvants (Butler Ellis et al, 1997; Chapple et al, 1993), pesticide formulations (Miller and Butler Ellis, 2000), nozzle design (Barnett and Matthews, 1992; Butler Ellis et al, 2002; Etheridge et al, 1999), nozzle orifice size (Nuyttens et al, 2007), and application pressure (Creech et al, 2015).…”

mentioning

confidence: 99%

Optimum Droplet Size Using a Pulse‐Width Modulation Sprayer for Applications of 2,4‐D Choline Plus Glyphosate

et al. 2019

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Core Ideas Model fit increased by predicting optimum droplet sizes for site‐specific scenarios. Generally, an Extremely Coarse spray would be recommended for a 2,4‐D choline plus glyphosate application. Site‐specific weed management using PWM sprayers was both manageable and effective. Weed control reductions were observed as droplet size increased at several site‐years. Alternative drift reduction efforts must be identified to avoid weed control losses. ABSTRACT The delivery of an optimum herbicide droplet size using pulse‐width modulation (PWM) sprayers can reduce potential environmental contamination, maintain efficacy, and provide more flexible options for pesticide applicators. Field research was conducted in 2016, 2017, and 2018 across three locations (Mississippi, Nebraska, and North Dakota) for a total of 6 site‐years. The objectives were to evaluate the efficacy of a range of droplet sizes (150 µm [Fine] to 900 µm [Ultra Coarse]) using a 2,4‐D choline plus glyphosate pre‐mixture and to create novel weed management recommendations using PWM sprayer technology. A pooled site‐year generalized additive model explained less than 5% of the model deviance, so a site‐specific analysis was conducted. Across the Mississippi and North Dakota sites, a 900‐µm (Ultra Coarse) droplet size maintained 90% of the maximum weed control. In contrast, at the Nebraska sites, droplet sizes between 565 and 690 µm (Extremely Coarse) were almost exclusively required to maintain 90% of the maximum weed control, likely due to weed leaf architecture. Severe reductions in weed control were observed as droplet size increased at several site‐years. Alternative drift reduction practices must be identified; otherwise, weed control reductions will be observed. This research illustrated that PWM sprayers paired with appropriate nozzle–pressure combinations for 2,4‐D choline plus glyphosate pre‐mixture could be effectively implemented into precision agricultural practices by generating optimum herbicide droplet sizes for site‐specific management plans. To fully optimize spray applications using PWM technology, future research must holistically investigate the influence of application parameters and conditions.

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“…In 2016, a low-speed wind tunnel at the Pesticide Application Technology Laboratory (PAT-Lab, University of Nebraska-Lincoln, West Central Research and Extension Center, North Platte, NE) was used to identify ground application nozzles and operating pressures that could effectively simulate the spray deposition collected from the cornfield aerial application. This system has been used for droplet sizing of different nozzle designs, tank solutions and pesticide application scenarios (Creech et al 2015, Vieira et al 2018, Butts et al 2019. Droplet size distribution data collected at Middle corn canopy position were targeted since this would include the major feeding and activity zone for WCR adults in the field…”

Section: Wind Tunnel and Spray-chamber Calibrationmentioning

confidence: 99%

Characterization of pyrethroid resistance in the western corn rootwormDiabrotica virgifera virgiferaLeConte

Souza¹

2016

2016 International Congress of Entomology

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Hemingway, and C. Strode. 2008. Expression of the cytochrome P450s, CYP6P3 and CYP6M2 are significantly elevated in multiple pyrethroid resistant populations of Anopheles gambiae s.s. from Southern Benin and Nigeria. BMC Genomics. 9: 538. Dong, K. 1997. A single amino acid change in the para sodium channel protein is associated with knockdown-resistance (kdr) to pyrethroid insecticides in German cockroach. Insect Biochem. Mol. Biol. 27: 93-100.

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Spray particle drift mitigation using field corn (Zea mays L.) as a drift barrier

Cited by 33 publications

References 45 publications

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Herbicide drift exposure leads to reduced herbicide sensitivity in Amaranthus spp.

Optimum Droplet Size Using a Pulse‐Width Modulation Sprayer for Applications of 2,4‐D Choline Plus Glyphosate

Characterization of pyrethroid resistance in the western corn rootwormDiabrotica virgifera virgiferaLeConte

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