## Abstract The knockβdown 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 20β with the
Insecticidal constituents from four species of the zingiberaceae
β Scribed by Chilwan Pandji; Claudia Grimm; Victor Wray; Ludger Witte; Peter Proksch
- Book ID
- 103338599
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 409 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0031-9422
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## Abstract The paralysis (knockβdown) 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
The volatile constituents of five fruits from four Syzygium species from Malaysia were isolated by vacuum distillation with subsequent extraction of the distillates with dichloromethane. The concentrated extracts were analysed by capillary GC and GC-MS. Forty-three components were identified in rose