Prevention is the most effective way for the CFIA to protect the plant resource base. However should a plant disease become introduced in Canada, the Agency's goal is to reduce its impact.
- Apple proliferation phytoplasma
- Asian soybean rust – Phakopsora pachyrhizi
- Bacterial wilt of geraniums - Ralstonia solanacearum
- Dutch elm disease (DED) Ophiostoma ulmi and Ophistoma novo-ulmi
- European larch canker - Lachnellula willkommii
- Ginseng anthracnose - Colletotrichum panacicola
- Grapevine yellows – Flavescence dorée and Bois noir
- Necrosis of Grapevine – Phomopsis viticola
- Oak wilt
- Phytophthora abietivora
- Plum pox virus
- Potato mop-top virus (PMTV)
- Potato spindle tuber viroid (PSTVd)
- Potato wart
- Scleroderris canker – Gremmeniella abietina
- Sudden oak death – Phytophthora ramorum
- Tomato brown rugose fruit virus
- Verticillium stripe – Verticillium longisporum