Toxicity Studies of Some Chinese Plants

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Abstract
Tests with 35 spp. of Chinese plants reputed to have insecticidal, piscicidal or medicinal value have been made Using silkworms, bean beetle larvae or bean aphids. Of these, 18 spp. killed 50% or more of at least one test species. Pachyrrhizus erosus seeds seem to offer the most promise of commercial value because of its annual habit and the fact that seeds could be obtained in quantity from Latin America where the plant is cultivated for the food value of its tubers. Millettia pachycarpa seeds are also potent insecticides, and the plant seems worthy of exptl. propagation for insecticidal purposes when propagating stock becomes available in the Western Hemisphere. Other spp. which seem to offer sufficient promise to justify further work are Delphinium delavayi, Tripterygium forestii, Phytolacca acinosa, 3 spp. of Aconitum and unidentified spp. of Celastrus and Palaquium.

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