Effects Of Lanthanum On The Growth And Reproduce Of Tenebrio Molitor L.

Tenebrio molitor L. is a kind of resource insects, which has high nourishing value and various healthy care functions. The rare earth elements (REs) have special electronic constructions, treated with suitable dosages, the REs may have fine biologic effects in promoting the growth, enhancing the rate of propagation, heightening the quality of outcome, elevating the resistance to stress and immunity on some animals and plants. Hence, the REs have been extensively applied in the agriculture, livestock and medical science etc.Ten treatments of lanthanum oxide with the densities from 10 mg to 300 mg ,each mixed with 1 kg of wheat bran were set to feed the larvae and adults of Tenebrio molitor. The model was set up by studying the lanthanum to larval growth, the reproductive capacity, the change of esterase isoenzyme in different developing stages of T. molitor, the remaining of the La in the larvae, and the larval toxicology to the mouse.The results of the experiments showed that, among the 10 densities, compared with the control group the beetles treated with 40 mg La/ kg bran had the best result in physiology and bio-chemistry . This treatment made the larvae put 43% more weight, the amount of daily oviposition of females increased 59%. Kunming mice those fed on the treated larvae were not significantly different from control mice in the weights of body and organs. 3% La was detected accumulated by the larvae, and few in the organs of mouse.