Persistence and Degradation of Bt Toxin in Two Soil Types Under Different Sterilization Regimes.

Changes in Bt Toxin Concentration in CK Soil The ELISA results for PS-CK indicated that, regardless of the amount of Bt toxin applied, the concentration of Bt toxin in the soil showed a trend of first decreasing, then increasing, and decreasing again over time ( Figure 2 a).

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