Ornamental: Phytotoxicity, Pollinators, and Site Sensitivity
What the exam tests
Ornamental pest management covers trees, shrubs, flowers, and nursery stock in landscapes and production. Questions emphasize phytotoxicity, pollinator protection, application timing, and the sensitivity of managed sites.
Concepts to master
- Phytotoxicity. Some products or tank mixes damage desirable plants, causing leaf burn, distortion, or stunting. Test on a small area, follow label species restrictions, and consider temperature and plant stress.
- Pollinator protection. Avoid applying insecticides to blooming plants when bees are foraging; follow label pollinator warnings and time applications to reduce exposure.
- Application methods. Foliar, soil drench, trunk injection, and granular applications each have appropriate uses; systemic products move within the plant and can affect pollinators in nectar and pollen.
- Drift and sensitive sites. Ornamentals are often near homes, water, and other desirable plants-drift management is critical.
- IPM and diagnosis. Correctly identify the pest or disease before treating; cultural and biological controls often come first.
Traps
Questions pair a fast knockdown product with a blooming shrub-tempting but harmful to pollinators. Another trap: assuming a product safe on one species is safe on all ornamentals. Watch for tank-mix incompatibility and temperature-related phytotoxicity.
Rule of thumb
Identify, then protect the plant and the pollinators. If a plant is in bloom and the label warns about bees, choose an alternative method or timing. Worked example: A label states "do not apply to blooming plants until petals fall." If the shrub is in full bloom, wait until bloom ends or use a labeled alternative-do not spray during bloom.