Carrier Volume Affects Herbicide Activity in Simulated Spray Drift Studies<sup>1</sup>

Banks, Philip A.; Schroeder, Jill

doi:10.1614/0890-037x(2002)016[0833:cvahai]2.0.co;2

Cited by 42 publications

(67 citation statements)

References 20 publications

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“…In 2010, grain sorghum yield was reduced 73% when applied in the constant carrier volume of 224 L ha À1 compared to a yield reduction of 55% when applied in the proportional carrier volume averaged across 56, 28, and 14 L ha À1 . These data are in contrast to those previously reported for 2,4-D on cotton (Gossypium hirsutum L.) and for glyphosate on sweet corn (Zea mays L.) (Banks and Schroeder 2002) and for glyphosate on corn (Ellis et al 2002) and for glyphosate on wheat (Triticum aestivum L.) (Roider et al 2008). A possible explanation for this is the number of droplets deposited on the grain sorghum leaves.…”

Section: Resultscontrasting

confidence: 98%

“…These results showing greater yield reduction in 2012 are likely attributable to reduced rainfall during the growing season (Table 1), perhaps due to decreased herbicide metabolism as the plants adjusted to drier conditions. The increased yield reduction from the proportional carrier volumes agree with results reported for glyphosate (Banks and Schroeder 2002;Ellis et al 2002;Roider et al 2008) but disagrees with 2010 results. A possible explanation could be increased epicuticular wax loads on grain sorghum plants in 2012.…”

Section: Resultssupporting

confidence: 49%

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Effect of Carrier Volume on Grain Sorghum Response to Simulated Drift of Nicosulfuron

Matocha¹,

Jones

2015

Weed technol.

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Research was conducted in 2010 and 2012 to determine the effect of simulated drift of nicosulfuron on growth and yield of grain sorghum. Herbicide rates represented 25, 12.5, and 6.3% of the use rate of nicosulfuron at 52 g ai ha−1. Nicosulfuron was applied in a constant carrier volume of 224 L ha−1where herbicide concentration decreased with reduction in rate, and in carrier volumes of 56, 28, and 14 L ha−1proportional to the 25, 12.5, and 6.3% herbicide rates, respectively. In 2010, grain sorghum injury and yield were greater when nicosulfuron was applied in constant compared to proportional carrier volume. Grain sorghum injury and plant height reduction increased with increasing nicosulfuron rate when averaged across carrier volume both years. In 2012, there was a greater reduction in grain sorghum yield from nicosulfuron applied in proportional carrier volume. These data indicate that simulated drift of nicosulfuron onto conventional grain sorghum causes significant height and yield reduction even at the lowest herbicide rate tested, and the effect of carrier volume may be influenced by seasonal rainfall.

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Section: Resultscontrasting

confidence: 98%

Section: Resultssupporting

confidence: 49%

Effect of Carrier Volume on Grain Sorghum Response to Simulated Drift of Nicosulfuron

Matocha¹,

Jones

2015

Weed technol.

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“…The reason for selecting this particular methodology for herbicide application was to avoid the potential underestimation of herbicide efficacy by applying dilute concentration of herbicide in a large carrier volume. Previous research dealing with simulated drift has suggested that in addition to the amount of herbicide delivered, the droplet size and the concentration of the herbicide solution should ideally be held in the same proportion as it would have been applied to the original target field (Banks and Schroeder 2000). Spray volume and concentration have been studied for both paraquat (McKinlay et al 1974) and glyphosate (Cranmer and Linscott 1990;Ellis et al 2001).…”

Section: Methodsmentioning

confidence: 99%

Remote Sensing to Detect Herbicide Drift on Crops

et al. 2004

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Glyphosate and paraquat herbicide drift injury to crops may substantially reduce growth or yield. Determining the type and degree of injury is of importance to a producer. This research was conducted to determine whether remote sensing could be used to identify and quantify herbicide injury to crops. Soybean and corn plants were grown in 3.8-L pots to the five- to seven-leaf stage, at which time, applications of nonselective herbicides were made. Visual injury estimates were made, and hyperspectral reflectance data were recorded 1, 4, and 7 d after application (DAA). Several analysis techniques including multiple indices, signature amplitude (SA) with spectral bands as features, and wavelet analysis were used to distinguish between herbicide-treated and nontreated plants. Classification accuracy using SA analysis of paraquat injury on soybean was better than 75% for both 1/2- and 1/8× rates at 1, 4, and 7 DAA. Classification accuracy of paraquat injury on corn was better than 72% for the 1/2× rate at 1, 4, and 7 DAA. These data suggest that hyperspectral reflectance may be used to distinguish between healthy plants and injured plants to which herbicides have been applied; however, the classification accuracies remained at 75% or higher only when the higher rates of herbicide were applied. Applications of a 1/2× rate of glyphosate produced 55 to 81% soybean injury and 20 to 50% corn injury 4 and 7 DAA, respectively. However, using SA analysis, the moderately injured plants were indistinguishable from the uninjured controls, as represented by the low classification accuracies at the 1/8-, 1/32-, and 1/64× rates. The most promising technique for identifying drift injury was wavelet analysis, which successfully distinguished between corn plants treated with either the 1/8- or the 1/2× rates of paraquat compared with the nontreated corn plants better than 92% 1, 4, and 7 DAA. These analysis techniques, once tested and validated on field scale data, may help determine the extent and the degree of herbicide drift for making appropriate and, more importantly, timely management decisions.

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“…Derivas acidentais durante a aplicação têm potencial para provocar danos em cultivos no sistema de semeadura direta (Hemphill Jr. & Montgomery, 1981;Gelmini, 1988;Ramsdale & Messersmith, 2001;Banks & Schroeder, 2002;Lyon et al, 2003b) e no algodoeiro Lyon et al, 2003a;Miller et al, 2004), fazendo-se necessário gerar informações para a caracterização e quantificação desses efeitos. Também, a possibilidade de uso de cultivares de algodão, soja e milho geneticamente modificados para resistência ao herbicida glyphosate deverá aumentar o potencial de deriva desse produto para culturas/cultivares sensíveis.…”

Section: Introductionunclassified