A method for trapping disparlure from air and its determination by electron-capture gas chromatography

Joseph, H. M.; Bierl, B. A.; Freeman, Horatio P.; Sonnet, Philip E.

doi:10.1021/jf60216a019

Cited by 13 publications

(6 citation statements)

References 5 publications

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“…The conversion of Z-9-tdf to its uic-dibromide, a derivative giving a strong electron-capture response, is similar to the previously published bromination of disparlure, the synthetic gypsy moth sex attractant (Caro et al, 1978). A dilute solution of bromine in a suitable solvent, like carbon disulfide, reacted quantitatively and almost instantaneously with Z-9-tdf.…”

Section: Resultssupporting

confidence: 77%

Determination of (Z)-9-tetradecen-1-ol formate, a Heliothis species mating disruptant, in air by electron-capture gas chromatography following photolytic cleanup

Joseph¹,

Freeman²,

Bierl-Leonhardt³

1979

J. Agric. Food Chem.

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Section: Resultssupporting

confidence: 77%

Determination of (Z)-9-tetradecen-1-ol formate, a Heliothis species mating disruptant, in air by electron-capture gas chromatography following photolytic cleanup

Joseph¹,

Freeman²,

Bierl-Leonhardt³

1979

J. Agric. Food Chem.

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“…It is difficult to make accurate measurements of concentrations of pheromone in field conditions (Caro et al 1978), especially over relatively short time periods (but see Murlis & Jones (1981)). Atmospheric physicists have derived theoretical results for the concentration of airborne material at any position downwind of a continuous point source at ground level, over open country, in near neutral conditions (see summary by Pasquill (1974)); these were confirmed by experiments (Sutton 1947;Cramer 1957).…”

Section: Ic R O M E T E O R O L O G Ic a L C O N S Id E R A T Io N Smentioning

confidence: 99%

A mathematical model for the flight of pea moth to pheromone traps through a crop

Perry

Wall

1984

Phil. Trans. R. Soc. Lond. B

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A model is presented that describes the average resultant track of a population of male pea moth, Cydia nigricana (F.), flying through a crop to a continuously emitting pheromone trap containing 100 pg (E,E)-8,10-dodecadien-1-yl acetate. This model, based on work by C. T. David, J. S. Kennedy, A. R. Ludlow, J. N. Perry and C. Wall J. chem. Ecol . 8, 1207 (1982), and modified for the effect of a crop, has particular reference to a line of interacting pheromone traps equally spaced along the mean wind direction at an emergence site. It is derived after extensive field observations. The model relates to the average flight behaviour of a population of moths, and is compatible with both the anemotactic theory and a system of integrated anemotaxis and longitudinal chemo-klinotaxis. We give two theoretical reasons and cite observational evidence which suggest that, within a wheat crop, a discrete plume breaks up at around 10—15 m from the source and that beyond this distance pheromone exists at a non-zero concentration at all downwind positions. Close to the source moths are assumed to respond to a discrete plume as described by David et al . (1982) and further from it to receive pheromone continuously and fly, on average, upwind. Because of the effects of the crop we suggest that equations ofatmospheric diffusion derived to predict time-averaged concentrations of pheromone may hold instantaneously. The average behaviour of a population of responding moths under these conditions is discussed. Far from the source there is a concentration of pheromone below which such moths sampling it are assumed not to respond; this is termed the threshold concentration and the positions where it occurs are termed the threshold contour. The contour is sketched for single and multiple sources. Such moths flying upwind to this contour are assumed to stop and then cast (move in a crosswind direction). This results in the moths either moving inside the contour to a region of concentration above the threshold, and resuming upwind flight, or moving outside the contour and, eventually, not responding further. Net movement in the former is therefore towards the source and such moths may eventually be caught. The model allows for random flight by non-responding moths outside the threshold contour, and for moths to ‘lose’ the discrete plume of one source and continue upwind flight to encounter that of the next source upwind. The model has ten parameters, five relate directly to moth flight behaviour, one to the degree of random flight, one to meteorological conditions, two describe the number and spacing of traps and the last governs numerical accuracy. Predictions from the model of proportional catch in each of a line of traps were made using a computer program. An extensive body of 406 sets of data concerning trap interactions was collected over six years and the model provided excellent fits to this data. Throughout this paper the model is described in biological terms, formulae are provided when necessary.

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“…A method for trapping disparlure (536) from air with type 4A molecular sieves and subsequent quantitative analysis of a brominated derivative by electron-capture GC has been developed by CARO et al (629). It has been successfully applied in the field to disparlure air concentrations as low as 0.2 ng/m 3 • Tenax GC has been used to collect volatile compounds from fungi that are attractive to cheese mites (630).…”

Section: Collectionmentioning

confidence: 99%

“…(Z)-1,6-Heneicosadien-ll-one (629), an attractive analog of the Douglas fir tussock moth (Orgyia pseudotsugata) sex pheromone (580) has been identified and synthesized by SMITH et at. (652).…”

Section: Ketonementioning

confidence: 99%

See 1 more Smart Citation

Insect Pheromones: A Critical Review of Recent Advances in Their Chemistry, Biology, and Application

Brand

Young²,

Silverstein

1979

Fortschritte Der Chemie Organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products

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A method for trapping disparlure from air and its determination by electron-capture gas chromatography

Cited by 13 publications

References 5 publications

Determination of (Z)-9-tetradecen-1-ol formate, a Heliothis species mating disruptant, in air by electron-capture gas chromatography following photolytic cleanup

Determination of (Z)-9-tetradecen-1-ol formate, a Heliothis species mating disruptant, in air by electron-capture gas chromatography following photolytic cleanup

A mathematical model for the flight of pea moth to pheromone traps through a crop

Insect Pheromones: A Critical Review of Recent Advances in Their Chemistry, Biology, and Application

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