Which statement best describes integrated pest management?
A Scheduled weekly spraying
B Eradicate every organism
C Combine compatible control methods
D Use one pesticide
Answer: C. Combine compatible control methods. IPM combines suitable cultural, biological, physical and chemical measures while considering crop, pest, economic and environmental conditions.
Why is accurate pest identification important before choosing a control method?
A Choose the right control method
B Spray all insects
C Ignore species differences
D Target beneficial organisms
Answer: A. Choose the right control method. Correct identification helps avoid treating harmless or beneficial organisms and helps prevent use of an unsuitable pesticide.
Before control begins, what does an action threshold indicate?
A The harvest date
B A pesticide’s expiry date
C The maximum crop yield
D Point where action merits consideration
Answer: D. Point where action merits consideration. An action threshold marks pest levels or conditions at which a control decision should be considered, before unacceptable economic damage occurs.
The economic injury level is the pest density at which what occurs?
A Every pest becomes harmful
B Damage cost equals control cost
C Crop yield reaches its maximum
D All natural enemies disappear
Answer: B. Damage cost equals control cost. The economic injury level is the lowest pest population at which the value of crop damage equals the cost of control.
How does regular field scouting improve pest decisions?
A Rely on last year’s counts
B Use regular field observations
C Spray on fixed dates
D Inspect only after harvest
Answer: B. Use regular field observations. Repeated observations help growers track pest presence and levels so decisions reflect current field conditions.
Suppose pest counts remain below the action threshold. What is the sound IPM response?
A Continue monitoring the field
B Apply a broad-spectrum spray
C Remove the entire crop
D Increase fertilizer immediately
Answer: A. Continue monitoring the field. A pest sighting alone does not always justify treatment; monitoring should continue until evidence supports action.
Overuse of broad-spectrum pesticides can trigger secondary pest outbreaks because what may happen?
A Crop roots grow deeper
B Soil nutrients become fixed
C Natural enemies are killed
D Pests lose all hosts
Answer: C. Natural enemies are killed. Broad-spectrum treatments can harm beneficial predators and parasitoids that naturally suppress other pest populations.
Rotating crops can reduce certain pest problems by doing what?
A Increasing pesticide residues
B Eliminating all soil organisms
C Keeping one host available
D Interrupt host and pest cycles
Answer: D. Interrupt host and pest cycles. Where crop and pest biology allow, rotation interrupts access to a preferred host and can disrupt pest life cycles.
Good field sanitation can lower pest carryover through which practice?
A Remove infested crop residues
B Store residues beside crops
C Leave damaged fruit in rows
D Increase volunteer host plants
Answer: A. Remove infested crop residues. Removing infested residues can reduce places where some pests survive between growing seasons.
Selecting a crop variety bred to resist a pest is an example of what?
A Chemical fumigation
B Host plant resistance
C Pest quarantine
D Mechanical trapping
Answer: B. Host plant resistance. Host plant resistance uses crop traits that make feeding, establishment or damage by particular pests more difficult.
Pheromone traps help a grower track which information?
A Measure soil nitrogen levels
B Count plant roots
C Estimate irrigation pressure
D Track adult activity and timing
Answer: D. Track adult activity and timing. Pheromone traps can monitor target pest activity and timing; trap catches should be interpreted alongside field scouting.
Why might a grower plant a trap crop near a main crop?
A Increase pest reproduction everywhere
B Replace all monitoring
C Draw pests from main crop
D Prevent seed germination
Answer: C. Draw pests from main crop. A trap crop can attract a target pest away from the main crop, but it must be managed so it does not become a pest source.
Nets and row covers control some pests mainly by doing what?
A Poisoning soil organisms
B Changing crop genetics
C Exclude pests with barriers
D Increasing pest feeding
Answer: C. Exclude pests with barriers. Physical barriers prevent some pests from reaching host plants when the barrier suits the crop and target pest.
Hand-picking caterpillars from plants is classified as which method?
A Hand-pick caterpillars
B Chemical control
C Host resistance
D Crop rotation
Answer: A. Hand-pick caterpillars. Manual removal is a mechanical control method, especially useful in small plots or when infestations are limited.
Releasing a parasitoid wasp to suppress a crop pest is an example of what?
A Soil fumigation
B Crop sanitation
C Chemical control
D Biological control
Answer: D. Biological control. Biological control uses natural enemies, including predators, parasitoids and pathogens, to suppress pest populations.
Unlike a parasitoid, a predator typically does what during its life?
A Develops inside one host
B Consumes many prey over life
C Feeds only on crop roots
D Produces pesticide residues
Answer: B. Consumes many prey over life. A predator commonly consumes multiple prey, while a parasitoid develops in or on a host and usually kills that host.
Preserving lady beetles and lacewings can help crops by supporting what?
A Increase pest resistance
B Preserve natural pest enemies
C Remove every pollinator
D Replace field monitoring
Answer: B. Preserve natural pest enemies. Many beneficial insects prey on crop pests, so conserving them can strengthen natural control.
Which bacterium is used in some microbial insecticides?
A Rhizobium leguminosarum
B Lactobacillus acidophilus
C Bacillus thuringiensis
D Saccharomyces cerevisiae
Answer: C. Bacillus thuringiensis. Bacillus thuringiensis, often called Bt, produces toxins that affect susceptible insect larvae and is used in microbial pest-control products.
Neem-based pest-control products belong to which broad group?
A Botanical pesticides
B Synthetic pyrethroids
C Mineral fertilizers
D Plant growth regulators
Answer: A. Botanical pesticides. Neem products are derived from a plant source and are classed as botanical pest-control products.
By definition, a microbial biopesticide uses what?
A Only synthetic solvents
B Only mechanical barriers
C Unprocessed crop residues
D Uses microorganisms or products
Answer: D. Uses microorganisms or products. Microbial biopesticides use microorganisms or substances produced by them to control particular pests.
Once monitoring confirms that control is needed, which principle should guide the choice?
A Choose effective, lower-risk control
B Use the strongest spray
C Treat every field identically
D Ignore non-target effects
Answer: A. Choose effective, lower-risk control. IPM evaluates effectiveness and risk, favoring effective methods with lower risks before resorting to broader or more hazardous controls.
Under IPM, when should a pesticide be used?
A After every rainfall
B Use only when justified
C Whenever one insect appears
D On a fixed weekly schedule
Answer: B. Use only when justified. IPM uses pesticides when monitoring and decision thresholds show they are needed, and integrates them with other measures.
Rotating pesticide modes of action can help achieve what?
A Guarantee zero crop damage
B Eliminate label requirements
C Increase pest reproduction
D Slow resistance development
Answer: D. Slow resistance development. Using different modes of action as directed can reduce repeated selection pressure favoring pests resistant to one mode.
Repeated use of the same pesticide mode of action most directly favors which pests?
A All beneficial species
B Only immature plants
C Pesticide-resistant individuals
D Pests without host plants
Answer: C. Pesticide-resistant individuals. Susceptible pests are more likely to be controlled, while resistant survivors may reproduce and increase resistance in the population.
Always follow which source for pesticide rates and precautions?
A A neighbor’s old notes
B An unlabeled internet post
C Follow all label directions
D A previous crop’s schedule
Answer: C. Follow all label directions. The product label provides required directions, rates, protective measures and other use restrictions for that product.
What period does a pre-harvest interval measure?
A Last treatment to harvest
B Planting to first flowering
C Spraying to next irrigation
D Harvest to seed storage
Answer: A. Last treatment to harvest. The pre-harvest interval is the required waiting period between the last pesticide application and crop harvest.
When a pesticide label requires protective equipment, what should an applicator wear?
A Ordinary clothing only
B Wear the specified protective equipment
C Any available fabric
D No equipment in sunlight
Answer: B. Wear the specified protective equipment. Applicators should use the personal protective equipment specified on the label for the product and task.
Spraying while pollinators actively forage can be avoided to do what?
A Increase pest resistance
B Delay crop maturity
C Attract more beneficial insects
D Reduce exposure to pollinators
Answer: D. Reduce exposure to pollinators. Timing and application choices that reduce pollinator exposure help protect beneficial organisms and ecosystem services.
Pesticide drift occurs when spray does what?
A Remains on treated leaves
B Breaks down in sunlight
C Enters a closed container
D Moves off the target site
Answer: D. Moves off the target site. Drift is pesticide movement away from the intended application site, potentially exposing people, crops or non-target organisms.
How does sprayer calibration support responsible application?
A Deliver the intended application rate
B Identify every pest species
C Increase wind speed
D Replace label instructions
Answer: A. Deliver the intended application rate. Calibration helps ensure equipment applies the intended amount and distribution instead of under- or over-applying product.
If pesticide exposure is suspected, what should be done first?
A Wait for symptoms to worsen
B Induce vomiting without advice
C Follow label first-aid directions
D Discard the product label
Answer: C. Follow label first-aid directions. The label’s first-aid instructions should be followed promptly; seek emergency or poison-control guidance when indicated.
Detailed records of pest counts and treatments help growers do what?
A Guarantee a pest-free harvest
B Evaluate trends and treatment outcomes
C Replace scouting next season
D Avoid reading product labels
Answer: B. Evaluate trends and treatment outcomes. Records help compare pest trends and assess whether control measures worked under particular field conditions.
Why does local weather matter when predicting pest activity?
A It sets pesticide prices
B Pest development and activity
C It changes crop ownership
D It replaces field checks
Answer: B. Pest development and activity. Temperature, rainfall and other local conditions can affect pest development, movement and the timing of control decisions.
When should a grower use pest counts to decide whether to spray?
A After spraying is completed
B Only after harvest
C Check field counts before spraying
D Whenever a calendar reminder appears
Answer: C. Check field counts before spraying. Scouting data compared with action thresholds helps determine whether control is warranted.
Calendar-based spraying is a weak IPM practice because it often does what?
A Ignores actual pest pressure
B Protects beneficial insects
C Improves pest identification
D Reduces unnecessary treatments
Answer: A. Ignores actual pest pressure. A fixed schedule may trigger treatments when pest populations do not justify them and may miss changing field conditions.
Quarantine measures are intended to accomplish what?
A Increase insect reproduction
B Replace crop rotation
C Raise pesticide application rates
D Prevent pest movement between areas
Answer: D. Prevent pest movement between areas. Quarantine and movement controls aim to prevent the introduction or spread of pests through plants, produce or other pathways.
Certified pest-free planting material can help prevent what?
A All weather damage
B Every weed emergence
C Prevent new pest introductions
D All nutrient deficiencies
Answer: C. Prevent new pest introductions. Using inspected or certified planting material can reduce the chance of introducing pests into a field or region.
Why can deploying diverse, well-chosen resistance sources benefit long-term pest management?
A Guarantee permanent immunity
B Slow pest adaptation
C Eliminate all monitoring needs
D Increase reliance on spraying
Answer: B. Slow pest adaptation. Where supported by crop-specific guidance, diversifying resistance sources can reduce repeated selection for pests adapted to one resistance trait.
In relation to the economic injury level, when is an action threshold usually set?
A Act only after crop loss
B Wait until harvest ends
C Spray after every sighting
D Act before economic injury
Answer: D. Act before economic injury. The action threshold is generally set early enough for control to prevent pest populations from reaching the economic injury level.
Early detection of an invasive crop pest can help achieve what?
A Limit establishment and spread
B Increase host availability
C Delay reporting indefinitely
D Remove the need for identification
Answer: A. Limit establishment and spread. Prompt identification and reporting can support timely containment before a new pest becomes widely established.
Not every insect or organism found in a field requires control because what is true?
A Some organisms are beneficial
B All organisms damage crops
C Every insect spreads disease
D Pests cannot be identified
Answer: A. Some organisms are beneficial. Some organisms are harmless or beneficial; accurate identification avoids unnecessary control and protects natural enemies.
The same pesticide mode of action should not be repeated indefinitely because it can do what?
A Prevent all crop growth
B Remove pesticide labels
C Selects resistant survivors
D Stop every pest outbreak
Answer: C. Selects resistant survivors. Repeated selection can leave resistant pests more likely to survive and reproduce, making future control less effective.
Compared with blanket spraying, treating only affected spots can do what?
A Guarantee complete eradication
B Limit non-target exposure
C Increase treated acreage
D Replace pest monitoring
Answer: B. Limit non-target exposure. Targeted treatment can reduce pesticide use and exposure outside the areas where control is needed.
Which description best fits a selective pesticide in IPM?
A Controls every organism equally
B Requires no label precautions
C Always safe for pollinators
D More selective, less non-target impact
Answer: D. More selective, less non-target impact. Selective products can affect target pests more than non-target organisms, although label directions and risk precautions still matter.
Biological control relies mainly on which agents?
A Unrelated crop fertilizers
B Natural enemies suppressing pests
C Weather forecasts alone
D Pesticide storage containers
Answer: B. Natural enemies suppressing pests. Biological control uses predators, parasitoids or pathogens that suppress pest populations.
Representative field sampling should include which locations?
A Inspect only the field entrance
B Count only damaged plants
C Choose only bare soil
D Sample representative field locations
Answer: D. Sample representative field locations. Sampling representative parts of a field gives a more useful picture than checking only conspicuous or convenient spots.
Where crop combinations suit the pest, mixed cropping may reduce pressure by doing what?
A Break large single-host blocks
B Increase uniform host availability
C Eliminate natural enemies
D Prevent all plant diseases
Answer: A. Break large single-host blocks. Some mixed-cropping systems disrupt continuous host availability and can make it harder for certain pests to locate or spread among host plants.
Why should IPM plans be adapted to each crop and region?
A Labels never apply locally
B All pests behave identically
C Crop, pest, and conditions differ
D Weather has no influence
Answer: C. Crop, pest, and conditions differ. Pest species, crop susceptibility, local ecology, economics and available control methods vary across crops and regions.
Beyond reducing crop damage, what broader outcome does IPM seek?
A Maximize pesticide use
B Remove every field organism
C Protect health and ecosystems
D Replace farmer decision-making
Answer: C. Protect health and ecosystems. FAO describes IPM as supporting healthy crops while minimizing pesticide use and related risks to people and the environment.
After applying a control measure, what should happen next?
A Check whether control worked
B Stop observing the field
C Repeat treatment automatically
D Remove all beneficial insects
Answer: A. Check whether control worked. Follow-up monitoring shows whether the method worked and supports the next decision in the continuing IPM process.