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Module 4
4.1:COMMUNICABLE DISEASES, DISEASE PREVENTION IMMUNE SYSTEM
Plant diseases
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Cards (4)
ring rot
a type of
bacteria disease
destroys vascular tissues affecting transport
of
fluids
damages leaves tubers
and the
fruit itself
Tobacco mosaic virus
a viral disease
infects plants and
causes damage to leaves
damage of leaves causes discolouration and prevents photosynthesis
resistant strain have been developed but no cure
blight
a
type
of
protoctist
has hyphae which enters plant
and
damages leaves
and
fruit
black Sigatoka
a type of fungal disease
causes
damage to leaves preventing photosynthesis
fungicides can kill it
