A simple guide to predicting aircraft spray drift

Craig, Ian; Woods, N.; Dorr, G. J.

doi:10.1016/s0261-2194(98)00006-4

Cited by 22 publications

(13 citation statements)

References 7 publications

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“…Deposition on soil seems to depend on the canopy cover, but the data obtained in this study for different fields and seasons are not well correlated ( R 2 = 0.42) to the plant canopy cover at the time of application, with deposition on plants being even more variable. This may reflect the differences in meteorological conditions at application, particularly wind speed and humidity (Craig et al, 1998).…”

Section: Resultsmentioning

confidence: 99%

Off‐Site Movement of Endosulfan from Irrigated Cotton in New South Wales

et al. 2001

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The fate and transport of endosulfan (6,7,8,9,10,10-hexachloro-1,5, 5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepin 3-oxide) applied to cotton (Gossypium hirsutum L.) fields were studied throughout three consecutive years on two selected locations in New South Wales (Australia). Rates of dissipation from foliage and soil, volatilization from the field, and transport of residues in irrigation and/or storm runoff waters were measured in order to estimate a total field balance. Dissipation of endosulfan from both foliage and soil is best explained by a two-phase process rather than by a first-order decay. Half-lives of total endosulfan toxic residues (alpha- and beta-endosulfan and the sulfate product) in the first phase were 1.6 d in foliage and 7.1 d in soil, and could be explained by the rapid volatilization of the parent isomers in the first 5 d (up to 70% of endosulfan volatilizes). In the second phase, half-lives were 9.5 d in foliage and 82 d in soil, mostly due to the persistence of the sulfate product. Concentration of endosulfan residues in runoff water varied from 45 to 2.5 microg L(-1) depending on the residue levels present on field soil at the time of the irrigation or storm events. These in turn are related to the total amounts applied, the cotton canopy cover at application, and the time since last spraying. Most of the endosulfan in runoff was found in the water phase (80%), suggesting it was bound to colloidal matter. Total endosulfan residues in runoff for a whole season accounted for no more than 2% of the pesticide applied on-field.

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Section: Resultsmentioning

confidence: 99%

Off‐Site Movement of Endosulfan from Irrigated Cotton in New South Wales

et al. 2001

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“…The Gaussian diffusion model is based upon the following equation:

\begin{matrix} d = khq/ true({ix}^{2} true) exp true[- {(h - vx/u)}^{2} / 2 (i^{2} x^{2}) true] \end{matrix}

where d = deposit (m 3 /m 2 ), k = constant (0.4), h = release height (4 m), q = line source (m 3 /m), i = turbulence intensity, x = downwind distance (m), v = sedimentation velocity (m/s), and u = mean windspeed (m/s). A more detailed explanation of this model has been provided by Craig et al (1998) Both Gaussian diffusion and AgDRIFT models have been successfully compared with spray drift data sets, by several researchers including Dorr (unpublished data, 1996) and Bird et al (1996)…”

Section: Methodsmentioning

confidence: 99%

Spray Drift of Pesticides Arising from Aerial Application in Cotton

et al. 2001

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“…Miller and Stoughton (2000) point out that a small amount of widespread dispersal is inevitable and that as downwind movement is primarily dependent on the stability of the atmosphere, it can be partially controlled by correct timing of spray operations. In contrast to the more complex models such as FSCBG and AgDrift, Craig et al (1998) used a simple Gaussian diffusion model to predict aerial spray drift deposition. Hooper and French (1998) used the model to examine ULV spray deposits for locust control.…”

Section: Flight Planningmentioning

confidence: 99%

Aerial application

2014

Pesticide Application Methods

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A simple guide to predicting aircraft spray drift

Cited by 22 publications

References 7 publications

Off‐Site Movement of Endosulfan from Irrigated Cotton in New South Wales

Off‐Site Movement of Endosulfan from Irrigated Cotton in New South Wales

Spray Drift of Pesticides Arising from Aerial Application in Cotton

Aerial application

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