Biological effects of some isolatedAbrus precatorius L. alkaloids towardsTetranychus urticae Koch

Three main alkaloids isolated fromAbrus precatorius L. seeds have been tested againstTetranychus urticae Koch. Hypaphorine was the most efficient alkaloid isolated fromA. precatorius seeds against the two-spotted spider mite where the pre-oviposition period was relatively elongated and the oviposition period was significantly shortened in comparison to the other two isolated alkaloids tested. Also, the fecundity of the females was drastically reduced in all treatments in comparison to the control.