WorksheetsCitrus Canker Quiz
Total questions: 15
Worksheet time: 8mins
What causes citrus canker?
A virus
A fungus
The bacterium Xanthomonas citri
An insect
What is a symptom of citrus canker on leaves?
Yellowing of the entire leaf
Raised lesions with a corky appearance
Wilting of the leaf
Complete defoliation
How does the bacterium responsible for citrus canker spread?
Through insect vectors
By wind-driven rain
By direct contact with infected soil
Through seed transmission
What is the most critical period for fruit infection in grapefruit?
0.5–1.5 inches in diameter
1.5–2.5 inches in diameter
2.5–3.5 inches in diameter
3.5–4.5 inches in diameter
What is the primary purpose of windbreaks in canker control?
To increase fruit size
To reduce wind speed to less than 20 mph
To enhance fruit color
To improve soil fertility
What is a recommended practice when planting a windbreak while replanting a citrus block?
Use only mature trees
Integrate the block into the windbreak design
Avoid using any windbreaks
Plant windbreaks only after citrus trees are fully grown
Which of the following is NOT a recommended method for controlling leafminer damage?
Use of petroleum oil
Application of Agri-mek
Increasing water supply
Use of Micromite
What is the effect of applying excessive doses of copper on dormant trees?
Increases fruit size
Reduces tree growth
Enhances leaf color
Promotes flowering
What is the role of Aura Citrus in plant immune system activation?
It acts as a pesticide
It induces both systemic and local immune responses
It increases soil fertility
It enhances fruit sweetness
What is the recommended drench water volume for applications of Actigard per tree?
4 to 8 fl oz/tree
8 to 16 fl oz/tree
10 to 20 fl oz/tree
6 to 12 fl oz/tree
Where can you find the Citrus Copper Application Scheduler online?
http://agroclimate.org/tools/citrus-copper-application-scheduler/
https://edis.ifas.ufl.edu/publication/fr289
https://citrusagents.ifas.ufl.edu/
https://www.fdacs.gov/Agriculture-Industry/Pests-and-Diseases
What is the purpose of calibrating and arranging nozzles when applying pesticides?
To increase the pesticide concentration
To ensure thorough distribution and treat as many acres as possible
To reduce the amount of pesticide used
To change the chemical composition of the pesticide
What is the recommended rate per acre for mature trees when using Aura Citrus?
25.6 fl oz/100 gal
12.8 fl oz/100 gal
32.2 fl oz/100 gal
15.0 fl oz/100 gal
Which pesticide is classified under FRAC MOA code P 01?
Aura Citrus
Copper fungicide
Actigard 50WG
None of the above
What should be done if stunting or yellowing is observed after application?
Decrease the application interval to 15 days
Increase the application interval to 60 days
Use a higher dosage
Stop applications immediately
