Bazaria dulanensis Du et Yan is an important pest of the shrub Nitrada tangutorum Bobr. in the southern Tsaidam Basin. Field and laboratory experiments were carried out to investigate the biology of B. dulanensis, and toxicity tests were run to determine the potential of four pesticides; alphacypermethrin, Neichanjian, avermectins and Caoduer to control this pest. The results show that this moth is univoltine in the Tsaidam Basin with five larval instars. The pupae overwinter in soil and adults emerge the following May. Mating and copulation were often observed during the first third of June, whereas the hatching of eggs occurred in late June. The larval stage occurred from midJune to lateAugust, and larvae pupated from mid to late August. Mid to late July is the critical time for control of earlystage larvae. The relative ingested toxicity of the 4 insecticides with respect to 4th instar larvae was, in descending order, alphacypermethrin > avermectins > Pseudomonas pseudoalcaligenes > Gynaephora ruoergensis Nuchear polyHedrosis rirus, and, for 5th instar larvae; alphacypermethrin > Pseudomonas pseudoalcaligenes> avermectins > Gynaephora ruoergensis Nuchear polyHedrosis rirus. The relative contact toxicity to 4th instar larvae was avermectins > Pseudomonas pseudoalcaligenes> alphacypermethrin > Gynaephora ruoergensis Nuchear polyHedrosis rirus, and for 5th instar larvae; Pseudomonas pseudoalcaligenes> avermectins > alphacypermethrin > Gynaephora ruoergensis Nuchear polyHedrosis rirus.