Calibration Accuracy of Pesticide Application Equipment

Grisso, Robert D.; Hewett, E. J.; Dickey, Elbert C.; Schnieder, Rollin D.; Nelson, Edward William

doi:10.13031/2013.26624

Cited by 17 publications

(8 citation statements)

References 2 publications

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“…The mTOR signaling pathway is known to promote aging through various mechanisms, 36 with reduced mTOR activities increasing the C. elegans life span by ≥2-fold. 37 mTOR is a serine/threonine kinase that is stringently regulated by upstream signals.…”

Section: Tboep Increased the L-arginine Content Andmentioning

confidence: 99%

Environmentally Relevant Concentrations of the Flame Retardant Tris(2-butoxyethyl) Phosphate Accelerate Caenorhabditis elegans Senescence

Hou,

Wu,

et al. 2023

Environ. Sci. Technol. Lett.

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Amid growing concerns surrounding the longevity of individuals, the acceleration of aging by pollutants has garnered significant attention. Tris(2-butoxyethyl) phosphate (TBOEP), a widely used organophosphorus flame retardant (OPFR), has been frequently detected in the environment; however, its impact on organism life spans remains unclear. This study investigated the effects of TBOEP on the life span of Caenorhabditis elegans at environmentally relevant concentrations of 0, 50, 500, and 5000 ng/L. TBOEP exposure reduced motility and shortened the life span of C. elegans in a dose-dependent manner, with the most significant effects observed at 5000 ng/L. Transcriptomics and metabolomics revealed that 5000 ng/L TBOEP significantly disrupted longevity regulation in C. elegans. This was mainly attributed to the abnormal regulation of genes encoding the heat shock proteins, lipase, and stearoyl-CoA desaturase as well as the increased l-arginine content in C. elegans. Concurrently, exposure to 5000 ng/L TBOEP significantly upregulated the microRNAs in the lethal-7 family, thereby accelerating C. elegans senescence. Overall, this study provides important insights into the effects of TBOEP on C. elegans senescence and could inform further studies assessing the environmental health risks of OPFRs.

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Section: Tboep Increased the L-arginine Content Andmentioning

confidence: 99%

Environmentally Relevant Concentrations of the Flame Retardant Tris(2-butoxyethyl) Phosphate Accelerate Caenorhabditis elegans Senescence

Hou,

Wu,

et al. 2023

Environ. Sci. Technol. Lett.

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“…Traditionally it is expected that common tap water or water from rivers or lakes used for preparing of pesticide solutions have a constant surface tension only slightly depending from temperature (Gittens, 1969;Grisso et al, 1988). Different surface tension means different flow rates and respectively different sprayed dose rates (Matthews, 2008).…”

Section: Introductionmentioning

confidence: 99%

Investigation about wetting ability (surface tension) of water used for preparation of pesticide solutions

Ganchev

2021

AAS

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<p class="042abstractstekst">The investigation about surface tension of water used for preparation of pesticide solutions reveals it is quite diverse and changeable without any logical correlation towards location, time, and type of water source. Moreover, spraying with solutions with lower surface tension give bigger flow rates due to the lower resistance of fluid to the nozzles. The conducted trials show that plant surfaces with more rough texture require to be sprayed with pesticide solutions with lower surface tension. The wax content of the surfaces has no significant impact on surface tension requirement.</p><p> </p>

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“…Agricultural field sprayers are designed to accurately apply pesticides, fertilizers, and other agrochemicals to the crop canopy, soil surface, or targeted weeds. Proper chemical application requires correct mixing of chemicals, calibration, and selection and setup of that equipment (Grisso et al, 1988). Individual nozzle spray pattern quality has been shown to decrease with orifice wear .…”

mentioning

confidence: 99%

“…A field survey of 140 pesticide applicators conducted in Nebraska found that only one in three liquid pesticide applicators had applied chemicals within 5% of the intended rate (Grisso et al, 1988). Proper application of pesticides is primarily dependent on the operator and his or her competence in equipment selection, calibration, and chemical mixing (Grisso et al, 1988).…”

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confidence: 99%

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Laboratory and Full Boom-Based Investigation of Nozzle Setup Error Effects on Flow, Pressure, and Spray Pattern Distribution

Forney¹,

Luck²,

Kocher³

et al. 2017

Applied Engineering in Agriculture

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Abstract.Pesticide application is an integral part of crop production, and ground-based agricultural boom sprayers are used extensively to apply pesticides to the crop canopy or soil surface across millions of acres in the United States. Efficient application is necessary to minimize costs and limit adverse environmental impacts. The goals of this study were to provide quantified measurements on the effects of nozzle setup errors on spray pattern uniformity and evaluate how laboratory patternator-based simulations would compare to measurements on a full spray boom. More specific objectives were to determine the effects of factors such as nozzle lateral angle, nozzle spacing, nozzle replacement, and nozzle pitch angle on spray pattern distribution and evaluate a simulation approach to predict the effects of single nozzle boom setup errors on full boom system pattern uniformity. Laboratory and sprayer-based tests were devised to quantify the impact of nozzle setup and operational errors on spray pattern uniformity, boom pressure, and nozzle flow rates. Results indicated that small variations in boom setup or nozzle operation (i.e., pressure or flow) can cause significant errors in spray nozzle distribution which may not be completely detectable by measuring spray pattern alone. Simulations using laboratory data from setup or operational errors reflected similar changes (differences less than 2.6%) in spray pattern CV as full boom data with similar setup errors. These findings were significant in that it may be possible to model errors within full boom spray distributions based on smaller laboratory-collected datasets. Keywords: Equipment, Equipment for crop protection, Patternator, Spray pattern distribution, Spraying.

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Calibration Accuracy of Pesticide Application Equipment

Cited by 17 publications

References 2 publications

Environmentally Relevant Concentrations of the Flame Retardant Tris(2-butoxyethyl) Phosphate Accelerate Caenorhabditis elegans Senescence

Environmentally Relevant Concentrations of the Flame Retardant Tris(2-butoxyethyl) Phosphate Accelerate Caenorhabditis elegans Senescence

Investigation about wetting ability (surface tension) of water used for preparation of pesticide solutions

Laboratory and Full Boom-Based Investigation of Nozzle Setup Error Effects on Flow, Pressure, and Spray Pattern Distribution

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