Low residue Diprite dipping of sheep with the Richards immersion- cage sheep dip
نویسندگان
چکیده
About 12 months ago Captec Pty Ltd registered a diazinon-based dipping product for sheep called Diprite. Diprite included new (patented) label instructions that enabled application of a consistent dose of chemical to all sheep dipped. Many pesticides ‘strip’ when used in sheep dips (including diazinon). Stripping is the process whereby the pesticide leaves the dip faster than the water removed with the dipped sheep. Traditional instructions attempt to offset this disproportionate loss of pesticide by charging the sump of the dip at a high concentration. This in fact accelerates the stripping reaction, leading to vast oscillations in sump concentration and sheep with highly variable doses of pesticide.
منابع مشابه
Exposure to sheep dip and the incidence of acute symptoms in a group of Welsh sheep farmers.
OBJECTIVES To measure the exposure of a group of farmers to organophosphate pesticide in sheep dip, and to record the incidence of symptoms after exposure. DESIGN A prospective study of the autumn 1992 dipping period. Working methods were assessed by questionnaire. Absorption of organophosphate pesticide was estimated before, immediately after, and six weeks after dipping by measuring plasma ...
متن کاملEstimation of cumulative exposure to organophosphate sheep dips in a study of chronic neurological health eVects among United Kingdom sheep dippers
Objectives—To derive a method for retrospectively estimating cumulative exposure to organophosphate (OP) pesticides among a cross section of United Kingdom sheep dippers, as part of a wider epidemiological study of neurological abnormality within this group of workers. Methods—A hygiene study of dipping sessions at 20 farms using diazinon based dips was carried out by two experienced occupation...
متن کاملEstimation of cumulative exposure to organophosphate sheep dips in a study of chronic neurological health effects among United Kingdom sheep dippers.
OBJECTIVES To derive a method for retrospectively estimating cumulative exposure to organophosphate (OP) pesticides among a cross section of United Kingdom sheep dippers, as part of a wider epidemiological study of neurological abnormality within this group of workers. METHODS A hygiene study of dipping sessions at 20 farms using diazinon based dips was carried out by two experienced occupati...
متن کاملImproved Design and Use of Shower and Plunge Dipping Equipment for the Eradication of Sheep Body Lice (Bovicola ovis)
Considerable evidence was available indicating that wet dipping practices were failing to eradicate lice on sheep and that ineffective wetting was believed to be a major contributory factor. To examine wetting of sheep in plunge and shower dips, a series of experiments were undertaken to investigate both the mechanical and management opportunities which might improve the efficiency and efficacy...
متن کاملAn epidemiological study of the relations between exposure to organophosphate pesticides and indices of chronic peripheral neuropathy and neuropsychological abnormalities in sheep farmers and dippers.
OBJECTIVES To investigate the hypothesis that chronic low level exposure to organophosphates (OPs) in sheep dips is related to clinically detectable measures of polyneuropathy. METHODS The design was a cross sectional exposure-response study of sheep dippers and other non-exposed groups. The study group consisted of 612 sheep dipping farmers, 53 farmers with no sheep dipping experience, and 1...
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