Figure 1.
Sampling locations of H. armigera field populations from China.
Northern China: Ac = Anci, Ay = Anyang, Gy = Gaoyang, Hm = Huimin, Jy = Juye, Kf = Kaifeng, Np = Nanpi, Ny = Nanyang, Qj = Qianjiang, Qx = Qiuxian, Qz = Quzhou, Xj = Xiajin, Yc = Yancheng. Northwestern China: Sc = Shache, Sw = Shawan.
Figure 2.
Responses to Cry1Ac activated toxin, Cry1Ac protoxin and Cry2Ab protoxin by H. armigera field populations sampled in 2010 from northern China (•) and northwestern China (○); and by SCD (△), a susceptible laboratory strain.
LC50: concentration killing 50% of larvae tested with 95% fiducial limits. Resistance ratio: LC50 divided by the LC50 of the susceptible Shawan population. Asterisks indicate LC50 values significantly greater than the LC50 values of all three susceptible populations (SCD, Sc, and Sw).
Table 1.
Survival at a diagnostic concentration of Cry1Ac activated toxin of H. armigera populations sampled in 2010 from northern China (N) and northwestern China (NW).