Recent advances in the prevention and treatment of blowfly strike in sheep : supplement to report no. 2 / by the Joint Blowfly Committee (Appointed by the Council for Scientific and Industrial Research, the New South Wales Department of Agriculture, and the Queensland Department of Agriculture and Stock).

Date:: 1943

Credit: Recent advances in the prevention and treatment of blowfly strike in sheep : supplement to report no. 2 / by the Joint Blowfly Committee (Appointed by the Council for Scientific and Industrial Research, the New South Wales Department of Agriculture, and the Queensland Department of Agriculture and Stock). Source: Wellcome Collection.

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lil. TREATMENT OF STRIKE: STRIKE DRESSINGS. In Report No. 2 it was stated that glycerine diborate and camphor- boric-acid emulsion (C.B.E.) were valuable but were impracticable under war-time conditions, and that other boric acid dressings were being tested. The zinc sulphate compound described in the Report was found to be less valuable than earlier tests indicated and is no longer recom- mended. The purpose of this section is to describe two improved boric acid dressings which have been devised by the Council’s Division of Economic Entomology. These are known as B.T.B. (boric acid, tar oil, and bentonite) and B.K.B. which is a modification of B.T.B. having more rapid killing effect on the maggots in the struck area. B.T.B. has been in commercial production for about two years. It has proved highly satisfactory, but owing to its delayed action on the maggots sometimes in sheep carrying less dense fleeces, such as crossbreds, some maggots are able to migrate from the dressed area and establish them- selves nearby. B.K.B. has been devised to overcome this difficulty. It has been tested carefully under insectary conditions and, to some extent, under field conditions and has proved to be an excellent dressing. At recent prices, the ingredients cost 1/3d. per gallon more than those of B.T.B. and rather bulkier containers are required. Certain ingredients of B.K.B. are available only in limited quantities under present circum- stances. The dressings may, therefore, not be available for general use under war-time conditions. B.T.B. is now prepared and sold by a number of manufacturers under various trade names. Graziers who desire to do so can purchase the ingredients and prepare B.T.B. or B.K.B. for their own use. Formulae and Preparation of B.T.B. and B.K.B. The formulae of these two dressings are as follows :— BACB: Percentage. Boric acid .. L5 by weight. Creosote and Kerosene (equal par e PA eile Bentonite At: 4 ; 3 : Agral 2 a Ko ee Oe Water ae ee ee ET e ee Bei Boric acid ee 2 «. lS by weight: Kerosene We eee Lysol 3] a Al ss ar er irene 5-4 Bentonite — ne a 3 4 Agral 2 Ss ‘i ee ee ee Water a Me racks lo eee Bentonite—So far, unprocessed bentonites from Australian sources have been found unsatisfactory for this purpose, and _ processed bentonites of American origin should be used.

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