California Applicator License Category D Plant Agriculture Practice Test

These questions are part of the practice quiz. Start practicing

• Failing to mix volatile pesticides thoroughly into soil causes which effect?
• To protect surface water near the field where you are applying a pesticide, you should
• A pesticide that is persistent in the soil and binds tightly to soil particles is most associated with which type of drift?
• Which management practice is commonly used in combination with host-plant resistance to enhance nematode control?
• If a pesticide is persistent in soil, which environmental process is most associated with its movement through the soil?
• If drift affects a neighboring crop, what steps should you take?
• Which practice helps minimize cross-contamination between products when filling spray tanks?
• Which statement best reflects protecting pollinators when choosing pesticides near flowering crops?
• What records should be kept for pesticide applications in California?
• What is phytotoxicity and how can it be avoided?
• Pests have become resistant to the pesticide normally applied at a site. Which information should you consider to select an alternative?
• How do you test sprayer uniformity in a new field?
• If a temperature inversion is observed, what is the recommended action?
• How do you ensure that a spray system delivers the correct rate?
• What is the recommended first step if crop injury is suspected after spray application?
• What information must you have before you can select a pesticide to use for vertebrate control?
• Which practice describes an effective approach to delaying pest resistance?
• Roller pumps are used for herbicide applications of which formulations?
• What does a label’s crop use restrictions mean?
• If the spray pattern is uneven, which issue is most likely?
• What is a buffer zone and why is it required?
• What are inert ingredients and why are they important?
• Which statement best describes a diaphragm pump’s typical use?
• Excessive drift is most directly caused by which nozzle placement?
• In IPM, what is a key reason for using multiple control methods?
• Roots of plants down one single row have been eaten away; which pest is most likely responsible?
• Which material is NOT listed as a nozzle material?
• For disease to occur, what combination must be present?
• Which of the following is NOT used to distinguish mites from insects?
• What term describes the movement of pesticide vapors through the air?
• Which weather factor can affect phytotoxicity, degradation, uptake by pest, and volatility?
• Banded-winged whitefly (Trialeurodes abutilonia) affects which of the following crops?
• A pest requires treatment and the crop will need to be picked by workers within the next two weeks. Which label information is most critical?
• A stomach poison applied to the upper surface of leaves will fail to control an insect if
• Which two pieces of pest information are essential before selecting a vertebrate-control pesticide?
• A pesticide that is soluble in water is most associated with which loss process?
• Degree-day phenology checks whether temperature development thresholds and rates have been determined for the pest being monitored.
• A disease resistant cultivar may still become infected when
• Which method is used to deposit pesticide directly onto target plants?
• Smother crops are used to
• How can you tell if a pesticide coverage is adequate in an area?
• Why are mixing directions on pesticide labels important?
• How does formulation type (EC, WP, SL, etc.) affect handling and drift?
• Which trait best distinguishes sedges from grasses?
• Alternaria Leafspot primarily affects which crop group?
• Which nozzle type is used most often with systemic products, but can also work with contact products if the spray high volume is greater than 40 GPA?
• Which practice helps protect natural enemies during pesticide applications?
• What is an MRL and how is it enforced?
• What are the key factors to consider when choosing a spray nozzle?
• Which single action will help decrease resistance?
• Sudden wilting of plants in random patches indicates which underlying issue?
• Pitfall traps are used to capture which organisms?
• A nematode-resistant plant may have vulnerability to
• What must you do to ensure label compliance?
• What is a primary consequence of not disposing of pesticide containers properly?
• Which weed category can be herbaceous or woody and has two seed leaves?
• Which chemigation system should you use to reduce drift and increase accuracy of pesticide application?
• To reduce the possibility of building up a pest's resistance to a pesticide you can
• Describe proper storage practices for pesticides.
• Excessive drift is most directly caused by which nozzle placement?
• Which of the following is a benefit of using more than one pesticide in the spray tank?
• Using transgenic plants without employing other IPM methods may increase a pest's
• Which practice helps prevent non-target exposure to poison baits?
• How does droplet size influence both coverage and drift risk?
• Why is crop rotation considered in integrated pest management?
• What is spray drift and a two-method approach to minimize it?
• Which weather condition detected at the application site should result in postponement or cancellation of the pesticide application?
• What is the role of FRAC classification in disease management?
• Which weed produces two seed leaves (dicotyledon) and can be herbaceous or woody?
• Why is crop growth stage important when applying pesticides?
• Weed seeds have been found in the soil of a recently plowed field. Which pesticide type would you use in this situation?
• Which life cycle pattern describes insects with incomplete metamorphosis?
• What wind speed threshold should trigger discontinuing spraying to reduce drift?
• Why is it important to prevent cross-contamination during mixing/loading?
• Dothiorella canker is caused by fungi in which genera?
• Which term describes the growth stage focused on leaf and stem development, not reproduction?
• Which statement best describes the role of IPM in pest control?
• When treating weeds or insects infesting the base of established trees or vines, you should use which application method?
• If pollinators are active in the area, which type of pesticide should be avoided?
• Nematodes have which life cycle progression?
• What maintenance steps ensure a sprayer remains accurate over time?
• When a pest has several distinct mechanisms to withstand pesticide chemicals allowing them to tolerate several classes of pesticides that are not tolerated to each other chemically, they have developed
• If weed seeds are in the soil of a field just plowed, choosing which herbicide category is most appropriate?
• Which nozzle is used for soil and foliar applications when better coverage is required than can be obtained from flooding or turbo flooding nozzles?
• An insect pest has reached the action threshold in a strawberry field. The next decision should be based on which factor?
• What is the proper sequence for cleaning a sprayer between products?
• The Mexican Leafhopper (Empoasca mexara) is primarily a pest of which crop?
• Venturi nozzles are most often used with which type of products?
• Turbulence chamber flood sprayers are recommended for which type of crop protection product applications?
• Which crop is listed as affected by Banded-winged whitefly in common reports?
• Which of the following is a sign that a tank mix may be incompatible?
• How can drift potential be assessed and mitigated in a field with wind variability?
• Sweep nets are used to collect which of the following?
• Which of the following is a sign of incompatibility developing in a tank mix?
• Which drift-related factor listed below is NOT a drift type?
• Three factors that make for effective pesticide use are
• Which system is recommended to reduce drift and increase accuracy of pesticide application in chemigation?
• Which nozzle is used for applying insecticides and fungicides on dense foliage?
• How can you minimize worker exposure during mixing and loading?
• In a weed growth progression, which term describes the growth stage when reproduction occurs?
• If a pesticide mixture has a thin, watery consistency, which drift is most likely to occur?
• Tillage and cultivation are used to
• Why is calibration essential for pesticide application?
• What is a tank-mix incompatibility and how can you check for it?
• Banks grass mite (Oligonychus partensis) primarily infests which crops?
• If you observe nozzle clogging, which component is most likely malfunctioning?
• Which of the following best describes misbranding?
• List three PPE items typically required by pesticide labels.
• Why avoid spraying during temperature inversions?
• Which practice helps limit pesticide movement toward surface water?
• Distinguish systemic from contact pesticides with a practical example.
• Mammals become pests when they do what?
• Which statement best describes restricted-use pesticides?
• Which nozzle is used when applying separate bands of spray that should not overlap?
• Why is it important to consider groundwater protection when choosing pesticides?
• In what ways can insects be used to control weeds?
• Which life cycle progression is described as Egg -> Larva -> Pupa -> Adult?
• How should you respond to a pesticide exposure emergency?
• Which statement about PPE and label requirements is true?
• Which nozzle is used in situations where you cannot use a spray boom but need a wide swath?
• What term is used for a plant that is not desirable in a crop field?
• What is required, in addition to a susceptible host, for disease to occur?
• Which organism has the life cycle described as Egg -> Larva -> Fry -> Juvenile -> Adult?
• Define misbranding and explain why it is illegal.
• What does the phrase label directions are non-negotiable mean for applicators?
• Manufacturers color grain baits to make them less attractive to birds. Which statement reflects a practice to reduce non-target bird attraction to grain baits?
• When is it appropriate to use drift-reducing nozzles?
• Roots of carrots split or become stubby, which pest is responsible?
• What is a key purpose of using compatibility agents in tank mixes?
• What is the purpose of a spill kit and SDS in pesticide handling?
• The rope-wick method is best described as which of the following?
• Which pump is used for low-pressure oil spray applications between 20 and 100 psi?
• Which nozzle is used when you cannot use a spray boom but need a wide swath?
• Which unit is used to express physiological time in pest development monitoring?
• Which weed is described as having a hollow stem and a ligule in the collar region?
• Which storage principle helps prevent accidental exposure and contamination?
• What is the purpose of conducting a jar test for a tank mix?
• If using a formulation with high drift potential, what should a boom sprayer be equipped with?
• If a jar test shows precipitation, what should you do?
• Gear pumps are used for low-pressure applications within what psi range?
• Which nematicide application is typically effective when nematodes are present in a field where crops are actively growing?
• In dense foliage, which equipment type is used to treat insects and disease?
• How can you protect pollinators when spraying near flowering crops?
• What must be used at all times when spraying?
• Basal application is used for pests located at which location?
• How can water pH influence the effectiveness of certain pesticides?
• Identify two common insecticide modes of action and a resistance concern.
• To reduce the number of applications needed to control fungal disease, which pesticide type is preferred?
• What is MOST likely to cause your pest control efforts to fail?
• Which statement best explains why you should follow label instructions when handling formulations?
• Nematodes have been discovered in a field where crop plants are actively growing. Which nematicide application is most effective at this site?
• What happens if added less than the required amount of active ingredient to a tank mix?
• What tool may be required to check the outer surface of plants for surface feeding invertebrates and the damage they cause?
• Which maintenance checks help ensure the sprayer delivers the intended application rate?
• Which practice is used to bury disease inoculum?
• If sprayer pressure is too low, what is the most likely cause?
• What is a recommended practice to prevent spills during mixing/loading?
• In what ways can insects be used to control weeds?
• If a pesticide is volatile, which drift occurs?
• Centrifugal pumps are used in a wide range of pressures (5 to 200 psi), especially when spraying what kind of materials?
• Which sampling method is used to collect adults and larvae or nymphs of invertebrates that are free-living on foliage?
• Which weather condition should prompt postponement due to drift risk?
• Physiological time is often expressed in units called
• What does REI stand for and what does it require?
• What steps should you take if crop injury occurs after application?
• Fungal diseases
• How does crop rotation help control nematode populations?
• Which equipment type is best described as being used for drift-sensitive soil applications?
• Why is documentation of pesticide usage important?
• What is the role of proper agitation in a spray tank?
• Define PHI and explain how it guides harvest timing.
• Which sampling method is best for capturing ground-dwelling organisms such as weevils and Collembola?
• What is a potential consequence of applying pesticides when flowers are in bloom?
• In a typical plant growth sequence, which stage follows Seed?
• Why should label rates be followed when applying pesticides?
• Which statement describes how environmental factors influence chemical degradation?
• Direct damage by vertebrate pests is best defined as?
• What quick field check can indicate that pesticide coverage is adequate?
• The first step to take before storing any application equipment is to
• Extended range flat-fan is used for soil and foliar applications when better coverage is required than flooding or turbo flooding nozzles. Which option best completes this statement?
• To avoid the development of resistance in pests, you should use pesticides with differing modes of action.
• Applying pesticides to places where pests do not usually breed, live, or feed results in which outcome?
• Which application method is used to deposit pesticide directly onto pest plants?
• Which organism has the life cycle Egg -> Larva -> Fry -> Juvenile -> Adult?
• If nozzles clog repeatedly, which component is most likely not working properly?
• Powdery accumulations on leaves and fruit are typically caused by which group of organisms?
• Which statement is TRUE about host-plant resistance to nematode infestation?
• What is a likely consequence of not following label restrictions on a pesticide product?
• Why do integrated pest management programs work better than relying on just one management method?
• Which practice supports resistance management in pest control?
• Which pump type is associated with high pressure or mixed high/low pressure operation (VRA-equipped sprayers)?
• Why is it important to document drift incidents and inform affected parties promptly?
• How does soil texture affect pesticide leaching to groundwater?
• Geese","choices":["Used for controlling weedy grasses in cotton, orchards, and vineyards","Used for combatting nematodes in soil","Used to pollinate crops","Used to manage soil moisture"],"answer":0},{
• How should you handle and dispose of empty pesticide containers?
• The threshold that defines the time during crop development when losses from weed interference are most likely to occur is called the
• How does wind variability influence application timing and method?
• Select the drawbacks of planting transgenic crops on a pest management plan. (choose all that apply.)
• Under what conditions are drift-reduction measures typically recommended?
• Why is it important to calibrate a sprayer before a field season?
• Explain the core principle of Integrated Pest Management (IPM) and its impact on pesticide use.
• How do environmental conditions after application influence residue persistence?
• If sprayer pressure is too high, which condition is most likely?
• Which nozzle is suitable for high pressure and high flow rate applications of insecticides and fungicides?
• Which sampling method involves shaking plants or beating branches over a drop cloth to collect adults and larvae/nymphs of easily dislodged insects and mites?
• Which statement best describes the role of pest monitoring in pest management?
• Which statement best explains why drift-reducing nozzles are used during spraying?
• What information does the Safety Data Sheet (SDS) provide in pesticide handling?
• Which of the following is NOT a benefit of pest monitoring?
• Which organism has the life cycle Egg -> Larva -> Pupa -> Adult?
• Which genus is associated with Alternaria Leafspot on cole crops?
• Smother crops are primarily used to
• What can you do to reduce the likelihood of pesticides settling out of clumping after mixing?
• Producers for thoroughly cleaning application equipment after use should start with reading the
• Which nozzle is suitable for high pressure and high flow rate applications of insecticides and fungicides?
• Which statement best defines direct damage from vertebrate pests?
• Which nozzle is used for applying herbicides and mixtures of herbicides and liquid fertilizers?
• Dothiorella canker, a plant disease, can infect crops such as
• Which spray accessory helps reduce drift when applying high-drift formulations?
• Powdery growth on leaves and fruit is caused by which group?
• Which statement best describes integrated pest management (IPM) in practice?
• Which weed is described as having elongated, V shaped leaves arising from solid, triangular stems?
• What is the primary purpose of reading and following a pesticide label?
• Which nozzle is used for applying insecticides and fungicides on dense foliage?
• Soil solarization
• Which factor is most relevant when planning drift reduction for a spray near a sensitive site?
• What is the purpose of buffer zones when spraying near flowering crops?
• Which organism's life cycle is described as Egg -> Juvenile -> Adult?
• Movement of nematodes over long distances primarily occurs via transport of what?
• Piston pumps are used for which conditions?
• What is a consequence of applying pesticides too frequently in an area?
• Which of the following does NOT influence the decision to apply pesticides at a given time in field crops?
• What is the WPS and who does it protect?
• An easy way to reduce pesticide drift is to discontinue spraying when wind speeds exceed
• What should you do if you cannot locate the pesticide label?
• Which organism is a microscopic roundworm that damages plant roots?
• Which statement is TRUE regarding common sources of viral disease in plants?