Abstract
Toxicities of cadmium (Cd) and ethylenediamine-tetra acetic acid (EDTA) on Bombyx mori larvae fed on artificial food under the aseptic conditions were examined.
A summary of the results is shown below.
1) Death of the larvae caused by Cd was shown in the concentration of 50 ppm when they were administrated during the first to the third instar and that of 100 ppm when administrated at the fifth instar.
2) Death of the larvae caused by EDTA was shown in the concentration of 0.08 mol when they were administrated during the first to the third instar and that of 0.16 mol when administrated at the fifth instar.
The lethal doses of EDTA in the larvae was shown in 0.1 mol during the first to the third instar and in 0.2 mol at the fifth instar, respectively.
Cd-or EDTA intoxication was confirmed with the dead larvae, but not observed any infectious diseases by microbes.
