Du Toit, R.Fiedler, O.G.H.Alexander, R.A.Clark, R.Louw, J.G.De Kock, V.E.2017-02-022017-02-0220161954Du Toit, R & Fiedler, OGH 1954, 'The protection of sheep against blowfly strike. II. The influence of the length of wool at the time of treatment on the duration of protection’, Onderstepoort Journal of Veterinary Research, vol. 26, no. 3, pp. 405-408.0330-2465http://hdl.handle.net/2263/58796The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.The duration of protection afforded to sheep against blowfly strike by the treatment of the wool with an insecticide possessing good powers of diffusion is correlated with the length of wool at the time of treatment. For every additional 1/4 inch in the length of fleece treated by B.H.C. wettable powder at a concentration of 0•5 per cent gamma, full protection is prolonged by 2 ½ weeks and partial protection by 6 weeks.en© 1954 ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). © 2016 University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle