## Abstract The knock‐down activities of pyrethrins I and II and cinerins I and II were studied on house flies (__Musca domestica__ L.) by a measured drop technique. Unanaesthetised flies held by suction during dosage were inspected at frequent intervals for 5 h. The tests were done at 20† with the
Insecticidal activity of pyrethrum extract and its four insecticidal constituents against house flies. VI—Relative toxicity of pyrethrin I and pyrethrin II against four strains of house flies
✍ Scribed by R. M. Sawicki; M. Elliott
- Publisher
- John Wiley and Sons
- Year
- 1965
- Tongue
- English
- Weight
- 429 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0022-5142
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## Abstract The paralysis (knock‐down) and the subsequent recovery or death of female house flies treated by a measured drop method was studied with each of the four active constituents of pyrethrum extract alone and in the presence of piperonyl butoxide (1 part of pyrethroid + 10 parts of piperony
## Abstract The influence of concentration and of time after treatment on knock‐down and recovery from the action of pyrethrum extract alone and with piperonyl butoxide at 2 : 1 and 1 : 5 w/w, was studied on house flies __(Musca domestica__ L.) by a measured drop method. The unanaesthetised flies,