The SOD activity in S. frugiperda larvae did not significantly vary over the infection time in the first and fifth instars (F5,12 = 0.92 and 2.20, respectively; p > 0.05) but significantly changed over time in the second, third, fourth, and sixth instars with a peak detected at 48, 24, 24, and 48 h, respectively (F5,12 = 11.28, 5.16, 4.46, and 4.49, respectively; p < 0.05) (Figure 7). The gene discussed is SOD1; the disease is infection.