Toxicity of some natural plant extracts against some organisms and their embryotoxicity and teratogenicity on chick-embryo [electronic resource].

Includes reference.

The Toxicity of aqueous and oil extracts of anise. Pimpinella anisum and garlic, Allium sativum L., and the aqueous extract of chamomile. Matricaria chamomilla were evaluated against three different organisms in the environment, the two spotted spider mite Tetranychus urticae, the cotton leafworm Spodoptera littoralis (Boisd.) and Bolti fish Tilapia Zilli. The results indicated that, garlic and anise oily extracts were non toxic to adult female mite T. urticae were toxic to cotton leafworm, while aqueous extract of chamomile was non toxic to Bolti fish. Garlic and anise oily extracts exhibited moderate toxicity to Bolti fish but they were considered non toxic if compared to the synthetic pyrethroids. Concerning the evaluation of embryo-toxicity and teratogenicity of aqueous and oil extracts of natural products, the data of all tested compounds either oil or aqueous extracts caused. continuous losses of egg¬weight throughout the incubation period, but this loss of egg-weight was not dose-dependent and was not a good parameter for teratogenicity evaluation. With regard to the effect of embryo-weight and embryotoxicity, the data revealed that, both extracts decreased significantly the weight of embryo and this effect was dose-dependent. Moreover. both extracts were significantly equitoxic and caused considerable mortality or even complete mortality when being administered at high concentration.

Summary in Arabic.

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