Contact toxicities of destruxins A and B against the grubs Exolontha serrulata(Gyllenhall)and Holotrichia ovata Chang were bioassayed by immersing the insects in aqueous dilutions.

Study on Correlation between Environmental Factors and Occurrence of Melolontha hipocastanea mongolica;

RAPD technique was used to classify four Holotrichia spp.

Study on biological characteristics of Maladera orientalis;