CDFA Environmental Monitoring &
Investigation Exam UPDATED ACTUAL
Exam Questions and CORRECT Answers
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
What is the best control for powdery mildew - CORRECT ANSWER - sulfur dust
Which of the following actions can be referred as cultural control - CORRECT
ANSWER - plant resistant varieties
Which of the following actions can be referred to as sanitation techniques - CORRECT
ANSWER - placing filters over irrigation outlets, cleaning equipment when moving to
another site, and removing weeds
How do you manage orange navel worm in almonds - CORRECT ANSWER - removal of
mummy nuts
What is the best method to treat Black Measels - CORRECT ANSWER - sodium arsenate
and thoroughly wet pruning wounds
Investigation Exam UPDATED ACTUAL
Exam Questions and CORRECT Answers
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
What is the best control for powdery mildew - CORRECT ANSWER - sulfur dust
Which of the following actions can be referred as cultural control - CORRECT
ANSWER - plant resistant varieties
Which of the following actions can be referred to as sanitation techniques - CORRECT
ANSWER - placing filters over irrigation outlets, cleaning equipment when moving to
another site, and removing weeds
How do you manage orange navel worm in almonds - CORRECT ANSWER - removal of
mummy nuts
What is the best method to treat Black Measels - CORRECT ANSWER - sodium arsenate
and thoroughly wet pruning wounds
