Science and Golf II: Proceedings of the 1994 World Scientific Congress of Golf

By A. J. Cochran; M. R. Farrally | Go to book overview

76

Dislodgeable and volatile residues from insecticide-treated turfgrass

K.C. Murphy, R.J. Cooper and J.M. Clark

University of Massachusetts, Amherst, MA, USA

Abstract

Two insecticides were applied separately to a 10 m radius plot of 'Penncross' creeping bentgrass (Agrostis palustris Huds.) in order to determine levels of dislodgeable and volatile residues. Source flux was estimated using the Theoretical Profile Shape (TPS) Method. The effect of post-application irrigation on residue dissipation was assessed. Maximum residue levels were compared to published dermal and inhalation “no-effect” values. As judged by this preliminary comparison, golfer exposure to airborne and dermal residues are deemed within safe levels, except in selected situations.

Keywords: Theoretical Profile Shape Method, Inhalation “No-Effect” Values, Dermal “No-Effect” Values, Evapotranspiration, Pesticide Fate, Turfgrass


1 Introduction

In order to maintain golf courses in acceptable conditions for play, pesticide application is sometimes necessary. Because of the potential for environmental contamination and human and non-target exposure however, there is increasing opposition to pesticide use. In order to assess the environmental fate and magnitude of pesticide exposure, foliar dislodgeable and airborne residues were measured from pesticide-treated turfgrass.


2 Experimental design

All experiments were conducted at the University of Massachusetts Turfgrass Research Facility in South Deerfield, MA. Isazofos (O-5-chloro-1-isopropyl-1H-1, 2, 4-triazol-3-yl O, O-diethyl phosphorothioate) and trichlorfon (dimethyl 2, 2, 2-trichloro-1-hydroxyethylphosphonate) were applied separately at the manufacturers' highest recommended rate to an established plot of 'Penncross' creeping bentgrass. For each application, a 10 m radius

Science and Golf II: Proceedings of the World Scientific Congress of Golf. Edited by A.J. Cochran and M.R. Farrally. Published in 1994 by E & FN Spon, London. ISBN 0 419 18790 1

-505-

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