Detrimental effects of water extracts from surface and interior of Taxus baccata leaves on the two-spotted spider mite (Tetranychus urticae Koch)
Furmanowa, M.; Kropczyńska, D.; Zobel, A.; Głowniak, K.; Sykłowska-Baranek, K.; Rapczewska, L.
Die Pharmazie 58(5): 340-342
2003
ISSN/ISBN: 0031-7144 PMID: 12779052 Document Number: 560936
Surface deposits on T. baccata needles, collected from Warsaw, Poland, removed by dipping in water of 96, 60 or 40 degrees C for 5 seconds, caused changes in the life history components of mites. Paclitaxel was among other peaks present in the removed fractions at concentrations between 0.017 and 0.170 micro g/g of fresh weight, which increased with increasing temperature. Long extraction for 60 minutes at only 40 degrees C did not increase removable paclitaxel, but extraction rate was highest (1.326 micro g/g) at 60 degrees C, suggesting that leakage from the interior of needles occurred. Mortality, developmental time, total fecundity, oviposition period and life history parameters of Tetranychus urticae were detrimentally affected.