What is the difference between Fungus and Plant?
Fungi have cell walls made of chitin and are unable to photosynthesize. As well, sexual reporduction is drastically different in fungi from plants.
Plants have cell walls made of cellulose. The most importnatn difference is that plants have chloroplasts containing chlorophyll, which enables to photosynthesize.
Fungicide is a chemical compound or organism that kills fungus. Contact fungicide is a spray, and it only protects the plant from fungus in the areas where the spray comes in direct contact. Systemic fungicide is taken up into the plant, so it is redistributed through the xylem vessels and protects the entire plant from fungus.