Current News and Conceptual Applications — Crop Protection Reviewer Questions

300 board-style Current News and Conceptual Applications items for the Agriculturist Licensure Examination. Try 40 questions free; lifetime access is ₱49. Group pesticides by mode of action rather than by trade name. The examination asks about resistance management far more often than about products.

300 built-in questions in this topic · approved additions may publish live · part of Crop Protection

Try Current News and Conceptual Applications

Sample Current News and Conceptual Applications questions with answers and explanations

Board-style items taken from the Crop Protection bank. Every answer is explained, which is the part that makes a review question worth doing twice.

A sugarcane extension team in Negros Occidental finds dense colonies of red-striped soft scale insect (Pulvinaria tenuivalvata) on the undersides of leaves, extensive honeydew, and black sooty growth. Which immediate field action best supports both diagnosis and outbreak containment?
- A. Spray the entire mill district immediately with one insecticide regardless of infestation level
- B. Burn every sugarcane field within five kilometers of the observation
- C. Wait until harvest because sooty growth is only cosmetic
- D. Collect georeferenced samples, confirm identification, delimit infested blocks, and restrict movement of infested planting materials correct
Why: Confirmation, georeferenced delimitation, and movement control are the defensible first steps for an expanding pest; indiscriminate area-wide spraying or delay can worsen ecological and spread risks.
A mill district must compare red-striped soft scale insect (Pulvinaria tenuivalvata) pressure among farms with different row lengths. Which sampling metric is most defensible?
- A. Kilograms of insecticide purchased per barangay
- B. Total insects counted in each entire farm
- C. Percentage of farmers reporting black leaves
- D. Number of infested leaves per fixed number of randomly selected stalks correct
Why: A fixed, standardized plant-based sampling unit allows valid comparisons among farms of different sizes and avoids confounding infestation with area or farmer behavior.
After an organic contact treatment against red-striped soft scale insect (Pulvinaria tenuivalvata), a researcher sees fewer live scales but abundant old sooty mold remains. What is the best interpretation?
- A. Live-insect counts and new honeydew production should be assessed because old sooty mold can persist after pest mortality correct
- B. The treatment failed because blackened leaves did not become clean immediately
- C. The field should be classified as pest-free based only on the reduced stickiness of leaves
- D. Only yield data are needed; insect survival should be ignored
Why: Residual sooty mold is not a direct measure of current survival. Post-treatment evaluation should separate live scale density and new honeydew from old discoloration.
A sugarcane cooperative plans to move seed cane from a farm with suspected red-striped soft scale insect (Pulvinaria tenuivalvata) to an uninfested municipality. Which decision is most appropriate?
- A. Mix the seed cane with material from clean farms
- B. Move the cane at night to reduce crawler activity
- C. Withhold movement until official inspection and pest-status confirmation, then use certified clean planting material correct
- D. Wash the trucks but move the planting materials without inspection
Why: Planting-material movement is a major pathway for sessile or crawler-producing pests. Official inspection and clean material are more reliable than informal washing or mixing.
An LGU receives limited funds for red-striped soft scale insect (Pulvinaria tenuivalvata) management. Which allocation is most likely to slow spread across barangays?
- A. Purchase one high-capacity sprayer without a monitoring plan
- B. Subsidize calendar spraying of every sugarcane field each week
- C. Train scouts, map infestations, sanitize equipment, and prioritize treatment of delimited hotspots correct
- D. Replace field surveillance with social-media reports only
Why: Early detection, mapping, sanitation, and hotspot-based action improve containment efficiency. Calendar spraying without surveillance wastes resources and increases resistance and non-target risks.
Field crews observe red-striped soft scale insect (Pulvinaria tenuivalvata) mainly on older lower leaves. Which sampling modification best reduces false negatives?
- A. Sample only harvested stalk billets
- B. Inspect only the youngest spindle leaves
- C. Include standardized examination of lower-leaf undersides on several stalks per sampling point correct
- D. Count only flying insects above the canopy
Why: The pest commonly colonizes leaf undersides; sampling the likely within-plant location improves detection sensitivity.
A farmer proposes repeated broad-spectrum insecticide applications against red-striped soft scale insect (Pulvinaria tenuivalvata) even where natural enemies are abundant. What is the strongest technical objection?
- A. They may disrupt predators and parasitoids and select for resistance without proving economic benefit correct
- B. Broad-spectrum sprays always increase sugar content
- C. They are prohibited for every sugarcane pest in the Philippines
- D. They cannot contact any scale insect
Why: Unnecessary repeated sprays can eliminate natural enemies and intensify resistance and resurgence risks. Product legality and efficacy must be verified for the registered crop–pest use.
A diagnostic laboratory receives sugarcane leaves with two reddish longitudinal marks but no intact insects. What should the laboratory request before confirming red-striped soft scale insect (Pulvinaria tenuivalvata)?
- A. A fertilizer analysis only
- B. Preserved specimens from symptomatic leaves plus field-location and host data correct
- C. A photograph of the mill
- D. A weather forecast
Why: Plant discoloration alone is insufficient for species confirmation. Intact specimens and associated field metadata support morphological or molecular diagnosis.

Try Crop Protection — first 40 free

Reference sources and currency

Current-events items are checked against primary or institutional agriculture sources. Core references include the following official organisations; the questions and explanations are independently written for this reviewer.

Coverage is reviewed for the 2026 examination cycle. Always confirm a changing schedule, regulation or product registration with the responsible agency.

Current News and Conceptual Applications — Crop Protection Reviewer Questions

Sample Current News and Conceptual Applications questions with answers and explanations

A sugarcane extension team in Negros Occidental finds dense colonies of red-striped soft scale insect (Pulvinaria tenuivalvata) on the undersides of leaves, extensive honeydew, and black sooty growth. Which immediate field action best supports both diagnosis and outbreak containment?

A mill district must compare red-striped soft scale insect (Pulvinaria tenuivalvata) pressure among farms with different row lengths. Which sampling metric is most defensible?

After an organic contact treatment against red-striped soft scale insect (Pulvinaria tenuivalvata), a researcher sees fewer live scales but abundant old sooty mold remains. What is the best interpretation?

A sugarcane cooperative plans to move seed cane from a farm with suspected red-striped soft scale insect (Pulvinaria tenuivalvata) to an uninfested municipality. Which decision is most appropriate?

An LGU receives limited funds for red-striped soft scale insect (Pulvinaria tenuivalvata) management. Which allocation is most likely to slow spread across barangays?

Field crews observe red-striped soft scale insect (Pulvinaria tenuivalvata) mainly on older lower leaves. Which sampling modification best reduces false negatives?

A farmer proposes repeated broad-spectrum insecticide applications against red-striped soft scale insect (Pulvinaria tenuivalvata) even where natural enemies are abundant. What is the strongest technical objection?

A diagnostic laboratory receives sugarcane leaves with two reddish longitudinal marks but no intact insects. What should the laboratory request before confirming red-striped soft scale insect (Pulvinaria tenuivalvata)?

Reference sources and currency

Other Crop Protection topics