Selecting plants for placement in the interiorscape as well as monitoring them for diseases and planning appropriate disease management strategies can be simplified if the key plants used in the interior are known and if the key diseases on those plants can be identified. Key plants are ones that frequently have diseases and should be monitored on a regular basis. In some locations, key plants should not be used if the amount of maintenance work required to assure the site looks well at all times must be minimized. Key diseases (those listed in bold) are those that frequently occur on the plants. The other diseases listed sometimes occur. If conditions at the planting site tend to favor the key diseases, the key plant should not be established there.

Aglaonema Colletotrichum Pythium Erwinia chrysanthemi Pseudomonas cichorii Xanthomonas dieffenbachiae	Epipremnum (Pothos) Colletotrichum Pythium Rhizoctonia
Begonia Botrytis Powdery mildew Pythium Impatiens necrotic spot virus foliar nematode	Ficus Cercospora Colletotrichum Phomopsis Glomerella
Brassaia (Schefflera) Alternaria Cercospora Phytophthora virus	Pepperomia Cercospora Phytophthora Pythium
Chrysanthemum Aschochyta, Alternaria, or Stemphyllium ray blight Botrytis Powdery mildew Pyhtium root rot Erwinia chrysanthemi Psuedomonas chicorii	Syngonium Cephalosporium Rhizoctonia Erwinia chrysanthemi Xanthomonas vitians
Cissus (Grape ivy) Downy mildew Powdery mildew	Hedera (English ivy) Colletotrichum Xanthomonas hederae
Cyclamen Fusarium wilt Impatiens necrotic spot virus	Philodendron Phytophthora Pythium Rhizoctonia Erwinia chrysanthemi Xanthomonas dieffenbachiae Pseudomonas cichorii Dasheen mosaic virus
Dieffenbachia Phytophthora Erwinia chrysanthemi Xanthomonas dieffenbachiae Dasheen mosaic virus	Schlumbergera (Holiday cacti) Fusarium Pythium Impatiens necrotic spot virus
Dracaena Colletotrichum Fusarium Phyllosticta	Saintpaulia (African violet) Phytophthora Botrytis Powdery mildew Rhizoctonia Erwinia chrysanthemi foliar nematode