Polyphenol oxidase (PPO) activity in wheat was found to be comparatively higher (0.249 specific activity/min/mg protein) in the plants treated with bioagent BS-DTBS-5, followed by BA-DTBA-11 (0.175 specific activity/min/mg protein) and PF-DTPF-3 (0.135 specific activity/min/mg protein) and Bgt after 120 h of infection (Figure 8). The gene discussed is PPOX; the disease is infection.