https://www.stuvia.com/user/performance
WASHINGTON PESTICIDE LAWS AND SAFETY:
ENVIRONMENTAL SAFETY AND WEATHER RESTRICTIONS
Original Questions with Answers and Rationales
Section 1: Wind Boundaries and Weather Restrictions
(Questions)
1. What is the general wind speed limit for most pesticide
applications to prevent drift?
A. 5 mph
B. 10 mph
C. 15 mph
D. 20 mph
Answer: B
Rationale: Most pesticide labels restrict application when
wind speeds exceed 10 mph. Higher wind speeds increase
drift potential and the risk of off-target movement.
2. Where is the specific wind speed restriction for a pesticide
product found?
A. On the SDS only
B. On the pesticide label, usually in the Directions for Use
or Environmental Hazards section
C. In the manufacturer's catalog
D. It is not specified anywhere
Answer: B
Rationale: The pesticide label specifies any wind speed
,https://www.stuvia.com/user/performance
restrictions for that specific product. Some labels may
have stricter limits (e.g., 5 mph) or no specific limit,
requiring professional judgment.
3. Why are pesticide applications generally prohibited or
restricted during high winds?
A. To save pesticide
B. To prevent drift and off-target movement that can
damage crops, harm people, and contaminate the
environment
C. To reduce equipment wear
D. To save time
Answer: B
Rationale: High winds carry spray droplets and dust
particles off-target, causing drift. This can damage
neighboring crops, harm people and wildlife, and
contaminate water sources.
4. What is the best time of day to apply pesticides to
minimize wind-related drift?
A. Midday when winds are strongest
B. Early morning or late evening when winds are typically
calmer
C. Afternoon when temperatures peak
D. Any time is fine
Answer: B
, https://www.stuvia.com/user/performance
Rationale: Winds are generally calmer in the early
morning and late evening, reducing drift potential.
Midday winds are often stronger, increasing drift risk.
5. What should an applicator do if wind speed increases
above the label limit during an application?
A. Continue spraying
B. Stop the application immediately and wait for conditions
to improve
C. Increase pressure to compensate
D. Lower the boom only
Answer: B
Rationale: If wind speed exceeds label limits during
application, the applicator must stop and wait for
conditions to improve. Continuing would violate the label
and increase drift risk.
6. What is the relationship between wind speed and droplet
drift?
A. Higher wind speed reduces drift
B. Higher wind speed increases drift by carrying droplets
farther off-target
C. Wind speed has no effect on drift
D. Only wind direction matters
Answer: B
Rationale: Higher wind speeds carry spray droplets
WASHINGTON PESTICIDE LAWS AND SAFETY:
ENVIRONMENTAL SAFETY AND WEATHER RESTRICTIONS
Original Questions with Answers and Rationales
Section 1: Wind Boundaries and Weather Restrictions
(Questions)
1. What is the general wind speed limit for most pesticide
applications to prevent drift?
A. 5 mph
B. 10 mph
C. 15 mph
D. 20 mph
Answer: B
Rationale: Most pesticide labels restrict application when
wind speeds exceed 10 mph. Higher wind speeds increase
drift potential and the risk of off-target movement.
2. Where is the specific wind speed restriction for a pesticide
product found?
A. On the SDS only
B. On the pesticide label, usually in the Directions for Use
or Environmental Hazards section
C. In the manufacturer's catalog
D. It is not specified anywhere
Answer: B
Rationale: The pesticide label specifies any wind speed
,https://www.stuvia.com/user/performance
restrictions for that specific product. Some labels may
have stricter limits (e.g., 5 mph) or no specific limit,
requiring professional judgment.
3. Why are pesticide applications generally prohibited or
restricted during high winds?
A. To save pesticide
B. To prevent drift and off-target movement that can
damage crops, harm people, and contaminate the
environment
C. To reduce equipment wear
D. To save time
Answer: B
Rationale: High winds carry spray droplets and dust
particles off-target, causing drift. This can damage
neighboring crops, harm people and wildlife, and
contaminate water sources.
4. What is the best time of day to apply pesticides to
minimize wind-related drift?
A. Midday when winds are strongest
B. Early morning or late evening when winds are typically
calmer
C. Afternoon when temperatures peak
D. Any time is fine
Answer: B
, https://www.stuvia.com/user/performance
Rationale: Winds are generally calmer in the early
morning and late evening, reducing drift potential.
Midday winds are often stronger, increasing drift risk.
5. What should an applicator do if wind speed increases
above the label limit during an application?
A. Continue spraying
B. Stop the application immediately and wait for conditions
to improve
C. Increase pressure to compensate
D. Lower the boom only
Answer: B
Rationale: If wind speed exceeds label limits during
application, the applicator must stop and wait for
conditions to improve. Continuing would violate the label
and increase drift risk.
6. What is the relationship between wind speed and droplet
drift?
A. Higher wind speed reduces drift
B. Higher wind speed increases drift by carrying droplets
farther off-target
C. Wind speed has no effect on drift
D. Only wind direction matters
Answer: B
Rationale: Higher wind speeds carry spray droplets
