THE EFFECTS OF EXTRACTS OF TATEGES ERECTA ON ACTIVITIES OF SEVERAL ENZYME OF TETRANYCHUS VIENNENSIS ZACHER Effects of seed dressing with imidacloprid on the seedlings growth and protective enzyme activities of high-yielding summer maize. Difference of tolerance and mechanism of various maize varieties to halosulfuron-methyl Molecular basis of sensitivity difference in wheat weeds to tribenuron-methyl Difference of tolerance and mechanism of various wheat varieties to tribenuron-methyl Drug resistance and mechanism between different maize varieties to chlorimuron-ethyl Resistance screening of oat germplasm to Ustilago segetum var.segetum Effects of endoparasitism by Ovomermis sinensis on the titers of juvenile hormones and 20-hydroxyecdysone in Helicoverpa armigera