Figure 1.

Symbiotic interactions within a generalized insect agricultural system. Arrows indicate a benefit and T-bars indicate suppression. A mutualistic symbiosis exists between the fungus and the insect. The fungus is food for the insect, and the insect provides raw materials for the fungus. The pathogen threatens the fungus, which in turn threatens the insect. The mutualistic bacteria produce antibiotics to suppress the pathogen. The insect provides nutrients and transports the bacteria.