Fig. 5. The disease resistance of Fusarium wilt by crops is normally divided into two strategies: strategy i (green) and strategy ii (orange).

These strategies are illustrated here, and the resistance level of the two strategies in the Foc-resistant cucumber and Foc-susceptible cucumber (FSC) are shown. In strategy i (plant resistance), plants act as executors by improving physical structures and secreting various new chemical components. In strategy ii (rhizosphere resistance), rhizosphere microorganisms recruited by plants act as executors to confront pathogens by perceiving pathogens, activating the plant immune system, and secreting various effective antimicrobial chemicals.