Potted mulberry seedlings as materials were placed in enclosed volume-fixed box made of synthetic glass and added with SO_2 with different concentrations, and the main physiologic and biochemical properties were studied. The SO_2 poisoning is serious problem to silkworm cocoon Production in main sericultural area of China.In order to find out meehanism of fluoride toxicology to silkworms.the glutathione and some correlate enzymes in hemolymph of the fluoride poisoned silkworm larvae wereassayed,and ...