Blight: When plants suffer from blight, leaves or branches suddenly wither, stop growing, and die.
Rots are diseases that decay roots, stems, wood, flowers, and fruit.
Rusts are a specific type of fungal disease which symptoms include a powdery tan to rust-colored coating on your plants.
Wilt: Plants wilt when they don't get enough water. When fungi clog a plant's water-conducting system, they can cause permanent wilting, often followed by the death of all or part of the plant. To make diagnosis more difficult, Wilt symptoms may resemble those of blight.
Preventive sprays of compost tea may help keep fungus at bay. Early detection will make the use of available commercial fungicides most effective. Removal and destruction of infected plants will help prevent fungus from spreading throughout your garden.