02288nas a2200265   4500008004100000245007800041210006900119260000900188300001400197490000700211520152900218653001401747653000901761653002001770653001401790653001401804653001101818653001001829653001401839653000901853653000901862100001701871700002501888856010901913       1998                        eng d00aTrends in the use of pesticides and pesticide residues on Queensland wool0 aTrends in the use of pesticides and pesticide residues on Queens  c1998  a694 - 6970 v763 aObjective To determine the amounts of organophosphorous and synthetic pyrethroid residues on Queensland wool sampled between 1995 and 1997, and to study ii pesticide use changed during the period. Design Estimated amounts of residues were obtained from a survey of Queensland wool clips, and information on pesticide use was obtained from a trace-back postal survey of flock managers. Procedure Trends in amounts of residues over time were assessed using analysis of variance and simple linear regression models, and changes in pesticide use was assessed using chi(2) tests. Results Significant linear reductions in organophosphorous (P = 0.0012), synthetic pyrethroid (P = 0.0044) and total (P = 0.0002) residues were detected. The proportion of wool growers treating for louse infestation (P = 0.0046) treating twice or more (P = 0.0006) and treating more than 4 months after shearing (P = 0.0001) decreased between 1994 and 1997. However, the proportion of growers who treated for blowfly strike (P = 0.0124) and used insect growth regulator pesticides increased (P < 0.0001). The use of handjetting to apply pesticides for blowfly strike control increased and the use of dips decreased (P < 0.0001). Conclusion Residues of organophosphorous compounds and synthetic pyrethroids reduced in Queensland wool between 1994 and 1997. Although woolgrowers treated for louse infestation less, pesticide use to control blowfly strike increased. The increasing use of insect growth regulators in the industry needs to be monitored.10aflystrike10alice10aorganophosphate10apesticide10aPyrethrum10aseries10asheep10asynthetic10atime10awool1 aWard, M., P.1 aArmstrong, R., T. F.  uhttps://phthiraptera.myspecies.info/content/trends-use-pesticides-and-pesticide-residues-queensland-wool