Plant diseases Flashcards
What type of disease is ring rot?
Bacterial, aftects potatoes, tomatoes, + aubergines
Once infected, field cant grow potatoes for 2 years
What are the symptoms of ring rot? Is there a cure?
Damages leaves, tubers, + fruit
Causes soft cheese-like rotting of vascular ring + wilting
No cure
What is potato blight caused by? And how does it spread?
Fungus-like protoctist
Hyphae penetrate host cells, destroying leaves, tubers, + fruit
What are the symptoms of potato blight? Is it curable?
Dark blotches on leaves, cause foliage to shrivel + collapse
No cure
How can we reduce infection risk of potato blight?
Resistant strains, careful management + chemical treatments
What type of disease is tobacco mosaic virus (TMV)?
Virus infecting tobacco plants - Releases genetic code (RNA) + plant mistakes code, producing virus proteins
What are the symptoms of TMV? Is it curable?
Causes mosaic pattern of brown spots on leaves, stunts growth, reduces yield
No cure, but resistant strains available
What type of disease is Black Sigatoka?
Fungal banana disease
Hyphae penetrate + digest cells, turning leaves black
What symptoms do Black Sigatoka cause? Is there a cure?
Attacks + destroys leaves, leaving them black
No cure, but resistant strains being developed
