DISEASE: Alfalfa dwarf
HOST: Alfalfa
Alfalfa dwarf is characterized by stunted plants (left), usually dark blue-green in color. Xylem tissues become brown, especially when exposed to air.
Alfalfa dwarf | Alfalfa
DISEASE: Alfalfa dwarf
HOST: Alfalfa (Medicago sativa)
PATHOGEN: Xylella fastidiosa
SOURCE: R. M. Davis
DISEASE: Grain rot
HOST: Rice
Close-up of diseased grain. Infected portions of lemma and palea are purplish to dark brown.
Grain rot | Rice
DISEASE: Grain rot
HOST: Rice (Oryza sativa)
PATHOGEN: Burkholderia glumae
PATHOGEN SYNONYM: Pseudomonas glumae
SOURCE: A. Alvarez, D. Shakya
DISEASE: Grain rot
HOST: Rice
Discolored and withered hulls of infected panicles. A brown margin between the infected and healthy parts of the grain is a diagnostic feature.
Grain rot | Rice
DISEASE: Grain rot
HOST: Rice (Oryza sativa)
PATHOGEN: Burkholderia glumae
PATHOGEN SYNONYM: Pseudomonas glumae
SOURCE: M. Goto
DISEASE: Rice yellow dwarf
HOST: Rice
Stunted and chlorotic plant with profuse tillering.
Rice yellow dwarf | Rice
DISEASE: Rice yellow dwarf
HOST: Rice (Oryza sativa)
PATHOGEN: 'Candidatus Phytoplasma oryzae'
PATHOGEN SYNONYM: Phytoplasma Rice yellow dwarf group
SOURCE: B. Raju, M. Davis