plant disease Flashcards
fungal + viral plant diseases
1
Q
what is an example of a viral plant disease?
A
- tobacco mosaic virus
2
Q
what is tobacco mosaic virus?
A
- leaves discolour in mosaic patterns
- rate of photosynthesis reduced
- growth stunted/reduced
-infect chloroplasts change colour from green to yellow
3
Q
how is tobacco mosaic virus prevented?
A
- field hygiene and pest control
4
Q
what is an example of a fungal disease found in plants?
A
- rose black spot
5
Q
what is rose black spot?
A
- black spots on rose bush leaves
- leaves turn yellow and drop off early
- reduces volume of chlorophyll, causing rate of photosynthesis to be reduced
- reduces rate of growth
- spread by water or wind
6
Q
how is rose black spot prevented?
A
- affected leaves by removed
- fungicides
- sterilise tools between plants
