Abstract: Locusta migratoria manilensis samples were collected from Huludao City of Liaoning Province, and the mercury concentration and distribution in their different organs were studied. The results showed that the mercury concentration in L. migratoria manilensis was relatively high, being 0.33-174.86 ng·g^-1, with an average of 36.44 ng·g^-1. The total concentration of mercury in L. migratoria manilensis and its different organs was significantly negatively correlated with its body length and mass, and decreased in the order of wing>head>abdomen>thorax≈leg. The absolute mercury concentration in L. migratoria manilensis increased with body mass, but decreased due to biomass dilution. Mercury was mainly accumulated in the head and wing of L. migratoria manilensis. The biomass dilution and mercury accumulation in wing might be the important mechanism of L. migratoria manilensis in resisting mercury hazard.

Key words: Automobile exhaust, Leaf cell pH value, Relative conductivity, Chlorophyll, Malondialdehyde, Superoxide dismutase, Peroxidase, Ascorbic acid