Fig. 1 

Effect of Nano-Se on the incidence of powdery mildew in leaves of melon cultivars of differing resistance at different infection stages. JSG, ZZX, HMC and JX represent the four melon cultivars with different resistances to powdery mildew, which are Jia shi, Zao zui xian (susceptible) and Huang meng cui, Jun xiu (resistant), respectively. CK and Nano-Se represent the control leaves and those sprayed with 5.0 mg⋅L⁻¹ Nano-Se, respectively. dpi: days post inoculation. The different lowercase letters above the bars indicate a significant difference (p＜ 0.05) between the treatments and the error bars represent standard deviations (n = 4)