WorksheetsCitrus Viroids Quiz
Total questions: 10
Worksheet time: 5mins
What are exocortis and cachexia caused by?
Bacteria
Fungi
Viroids
Viruses
What symptom is associated with exocortis?
Leaf curling
Bark scaling
Root rot
Fruit discoloration
Which citrus stock is especially sensitive to cachexia?
Rangpur lime
Orlando tangelo
Swingle citrumelo
Carrizo citrange
How are viroids primarily transmitted?
Through seeds
By insects
By the introduction and propagation of infected budwood
Through water
What is a recommended practice for knives and pruning tools in nurseries?
Use only once
Disinfect with a fresh solution of bleach
Sharpen regularly
Store in a dry place
What is the effect of citrus dwarfing viroid?
Causes fruit drop
Causes stunting but no scaling
Causes leaf yellowing
Causes root decay
What is the purpose of indexing on Etrog citron?
To increase fruit size
To detect exocortis and dwarfing viroids
To enhance growth rate
To improve fruit flavor
What should growers do to ensure they are using viroid-free budwood?
Purchase from uncertified sources
Use only local sources
Only purchase trees propagated from certified sources
Grow their own budwood
What is a symptom of cachexia?
Leaf curling
Severe pitting and gumming in the bark
Root rot
Fruit discoloration
What should be done with groves suffering from severe stunting caused by exocortis or cachexia?
Prune the affected areas
Apply fertilizer
Remove and replace with healthy trees
Increase watering
