Study on identification of Cistanche Hebra and its adulterants by PCR amplification of specific alleles based on ITS sequences Authentication of Lonicera japonica using bidirectional PCR amplification of specific alleles Study on identification of "Digeda" raw materials in Mongolian patent medicine by PCR amplification of specific alleles Study on identification of Astragali Radix and Hedysari Radix by PCR amplification of specific alleles Detection of beta-cypermethrin resistance in Shandong populations of Spodoptera exigua by competitive PCR amplification of specific allele