Georgia Pesticide Exam Study Guide
A plant has the following symptoms. Yellow bands form around the leaf veins,
and the plant is stunted. What is the most likely cause for this disease?
a) Nematode
b) virus
c) fungus
d) bacterium - ANS - B.
\Anthracnose, scab, leaf blotch, and shot hole are examples of which kind of
plant disease?
a. Leaf spots
b. virus
c. stem blights
d. wilts - ANS - a
\Disease symptoms and signs are caused by interaction between:
a. host plant and pathogen
b. the pathogen and the environment
c. the environment and the plant
d. all of the above - ANS - d
\For plant diseases, what does the term "contagious" mean?
a. the disease can be passed from plant to plant
b. the disease is caused by mechanical injury that occurs all the way down the
row
c. the disease can cause complete crop loss
d. the disease occurs harmlessly in the soil until a susceptible crop is planted -
ANS - a
\Fusarium wilt is often caused by an interaction between what two organisms?
a. nematodes and fungi
b. nematodes and bacteria
c. nematodes and virus
d. all of the above - ANS - a
\Groundwater contamination is the most likely when pesticides are applied to
what kind soil?
a. clay soil
b. soil with large amount of organic
c. loamy soil
d. sandy soil - ANS - d
\How can you avoid back-siphoning when you are filling a tank with hose?
, a. leave an air gap between the hose and the liquid in the tank
b.keep the end of the hose near bottom of the spray tank during the fill process
c. fill the tank completely. Adjust the amount of pesticide added to maintain
proper mix.
d. allow the hose to completely drain into the tank before you remove the hose -
ANS - a
\How can you reduce the risk of pytotoxicity?
a. apply pesticides during bright, hot weather to ensure quick drying
b. mix pesticides together to reduce the total number of applications
c. use highly concentrated applications to avoid excessive water on the plants
d. avoid application of pesticides to plants under environmental stress - ANS - d
\If you double the effective spray width, how is the spray application rate
affected?
a. the rate is doubled
b. the rate is increased four times
c. the rate is decreased by 1/2
d. the rate is unchanged - ANS - c
\If you double the ground speed of the sprayer, how does the new speed affect
the amount of pesticide being applied?
a. the amount of pesticide applied is not changed
b. the amount of pesticide is decreased by 50% or (1/2)
c. the amount of pesticide is also doubled
d. the amount of pesticide applied is reduced by the square of the new speed -
ANS - b
\If you wish to double the flow rate, how much would you have to increase the
spray pressure?
a. increase pressure 50%
b. double the pressure
c. increase the pressure four times
d. decrease the pressure by 50% - ANS - c
\Injury from triazine herbicides if similar to injury from substituted ureas because
they have the same mode of action. What is their mode action?
a. inhibition of photosynthesis
b. inhibition of leaf expansion
c. inhibition of lipid synthesis
d. inhibition of amino acid synthesis - ANS - a
\Leaching can result in groundwater contamination. What is leaching?
a. movement of pesticide down through the soil
b. movement of pesticide along surface of the soil until it reaches a well or
sink-hole
A plant has the following symptoms. Yellow bands form around the leaf veins,
and the plant is stunted. What is the most likely cause for this disease?
a) Nematode
b) virus
c) fungus
d) bacterium - ANS - B.
\Anthracnose, scab, leaf blotch, and shot hole are examples of which kind of
plant disease?
a. Leaf spots
b. virus
c. stem blights
d. wilts - ANS - a
\Disease symptoms and signs are caused by interaction between:
a. host plant and pathogen
b. the pathogen and the environment
c. the environment and the plant
d. all of the above - ANS - d
\For plant diseases, what does the term "contagious" mean?
a. the disease can be passed from plant to plant
b. the disease is caused by mechanical injury that occurs all the way down the
row
c. the disease can cause complete crop loss
d. the disease occurs harmlessly in the soil until a susceptible crop is planted -
ANS - a
\Fusarium wilt is often caused by an interaction between what two organisms?
a. nematodes and fungi
b. nematodes and bacteria
c. nematodes and virus
d. all of the above - ANS - a
\Groundwater contamination is the most likely when pesticides are applied to
what kind soil?
a. clay soil
b. soil with large amount of organic
c. loamy soil
d. sandy soil - ANS - d
\How can you avoid back-siphoning when you are filling a tank with hose?
, a. leave an air gap between the hose and the liquid in the tank
b.keep the end of the hose near bottom of the spray tank during the fill process
c. fill the tank completely. Adjust the amount of pesticide added to maintain
proper mix.
d. allow the hose to completely drain into the tank before you remove the hose -
ANS - a
\How can you reduce the risk of pytotoxicity?
a. apply pesticides during bright, hot weather to ensure quick drying
b. mix pesticides together to reduce the total number of applications
c. use highly concentrated applications to avoid excessive water on the plants
d. avoid application of pesticides to plants under environmental stress - ANS - d
\If you double the effective spray width, how is the spray application rate
affected?
a. the rate is doubled
b. the rate is increased four times
c. the rate is decreased by 1/2
d. the rate is unchanged - ANS - c
\If you double the ground speed of the sprayer, how does the new speed affect
the amount of pesticide being applied?
a. the amount of pesticide applied is not changed
b. the amount of pesticide is decreased by 50% or (1/2)
c. the amount of pesticide is also doubled
d. the amount of pesticide applied is reduced by the square of the new speed -
ANS - b
\If you wish to double the flow rate, how much would you have to increase the
spray pressure?
a. increase pressure 50%
b. double the pressure
c. increase the pressure four times
d. decrease the pressure by 50% - ANS - c
\Injury from triazine herbicides if similar to injury from substituted ureas because
they have the same mode of action. What is their mode action?
a. inhibition of photosynthesis
b. inhibition of leaf expansion
c. inhibition of lipid synthesis
d. inhibition of amino acid synthesis - ANS - a
\Leaching can result in groundwater contamination. What is leaching?
a. movement of pesticide down through the soil
b. movement of pesticide along surface of the soil until it reaches a well or
sink-hole
