CDFA Environmental Monitoring &
Investigation Exam
Which is a vector of Pierce's Disease on the Central Valley - correct answer-red headed
sharpshooter
How do you manage Branch and Twig Borer - correct answer-remove and burn all dead
wood and bush in and around vineyard, prune out any dead canes and damaged vines early
in spring, examine pruning cuts for exit holes and frass
Which pest requires a microscope to view and identify - correct answer-two-spotted mite
Grape Bud Beetles are difficult to control because - correct answer-they're only active at
night
Why is anagrus epos a more effective parasite for grape leafhopper eggs than variegated
leafhopper eggs - correct answer-difference on behavior having to do with egg placement
What is the best control for Botrytis Bunch Rot during the growing season - correct
answer-remove leaves from canopy
Grape Mealybug was a problem in the 1920s and then not a problem in the 1960s with
phasing out of DDT and then again a problem with the use pf organophosphates. What is
the reason for this fluctuation - correct answer-because pesticide changes affect natural
controls
What is the best way to help prevent and manage Pierce's Disease when going to new
location - correct answer-plant resistant varieties
What is the reason for the failure of trichogramma a a parasite against coddling moth -
correct answer-trichogramma reduced by natural control before enough eggs could be
parasitized
Which of the following is the best management for Eutypa Dieback - correct answer-prune in
spring so wounds dry
What is the best method for treatment of Oak Root Fungus - correct answer-chemical
fumigation
What disease can only be treated by preplant soil fumigation - correct answer-Armillaria
Root Rot
What is the life cycle of a perennial weed - correct answer-mature in summer, senesce in
fall, and underground parts overwinter
Investigation Exam
Which is a vector of Pierce's Disease on the Central Valley - correct answer-red headed
sharpshooter
How do you manage Branch and Twig Borer - correct answer-remove and burn all dead
wood and bush in and around vineyard, prune out any dead canes and damaged vines early
in spring, examine pruning cuts for exit holes and frass
Which pest requires a microscope to view and identify - correct answer-two-spotted mite
Grape Bud Beetles are difficult to control because - correct answer-they're only active at
night
Why is anagrus epos a more effective parasite for grape leafhopper eggs than variegated
leafhopper eggs - correct answer-difference on behavior having to do with egg placement
What is the best control for Botrytis Bunch Rot during the growing season - correct
answer-remove leaves from canopy
Grape Mealybug was a problem in the 1920s and then not a problem in the 1960s with
phasing out of DDT and then again a problem with the use pf organophosphates. What is
the reason for this fluctuation - correct answer-because pesticide changes affect natural
controls
What is the best way to help prevent and manage Pierce's Disease when going to new
location - correct answer-plant resistant varieties
What is the reason for the failure of trichogramma a a parasite against coddling moth -
correct answer-trichogramma reduced by natural control before enough eggs could be
parasitized
Which of the following is the best management for Eutypa Dieback - correct answer-prune in
spring so wounds dry
What is the best method for treatment of Oak Root Fungus - correct answer-chemical
fumigation
What disease can only be treated by preplant soil fumigation - correct answer-Armillaria
Root Rot
What is the life cycle of a perennial weed - correct answer-mature in summer, senesce in
fall, and underground parts overwinter
