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The Use of a Plaster Substratum for testing Pyrethrum-oil Films against Ornithodorus moubata, Murray (Acarina : Argasidae)
Published online by Cambridge University Press: 10 July 2009
Extract
Pyrethrum-oil films were tested in various forms on plaster substrata against the tick, Ornithodorus moubata. The insecticide was most effective if applied :—
1. Concentrated rather than dilute.
2. In a medium rather than a light petroleum oil.
3. As an emulsion in Lanette Wax Solution rather than in oil alone.
4. With an irritant (such as 4-chlor-2-methyl-phenol) present in the solution.
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