WorksheetsCitrus Melanose Management Quiz
Total questions: 10
Worksheet time: 5mins
What is the primary cause of melanose in citrus production?
Bacteria
Virus
Fungus
Insect
At what age of groves is melanose management usually not required?
Less than 5 years
Less than 10 years
More than 15 years
More than 20 years
What is the optimal temperature range for the production of spores by D. citri?
60°F–70°F
70°F–80°F
75°F–80°F
80°F–90°F
What is the recommended diameter of fruit for the first application of fungicide on grapefruit?
0.1 inch to 0.2 inch
0.25 inch to 0.5 inch
0.5 inch to 0.75 inch
0.75 inch to 1 inch
What is the role of dead wood in the spread of melanose?
It prevents the spread
It has no effect
It increases the spread
It reduces the spread
When should copper fungicides be applied to manage late melanose damage?
When temperatures are above 94°F
From May to September
Only in early June
During the winter months
What is a potential consequence of using strobilurin fungicides too frequently?
Increased cost
Development of resistance
Reduced effectiveness of copper fungicides
Damage to the fruit
What is the main advantage of using copper fungicides for melanose control?
They are more economical
They are less toxic
They require less frequent application
They are more effective in cold weather
Which pesticide should not be applied more than 1.5 lb a.i./acre/season of azoxystrobin?
Amistar Top
Gem 500 SC3
Headline SC3
Pristine
What is the recommended rate for copper fungicide?
Use label rate
12–15.5 fl oz
1.9–3.8 fl oz
16–18.5 fl oz
