How does light exposure affect stored seed?
Written by
Hoang Long
Reviewed by
Prof. Henry Webster, Ph.D.It has been found that exposure of bird seed to constant light deteriorates its quality. Ultraviolet rays break down certain nutrients if allowed to act for over 200 hours, thereby diminishing their nutritional value while rendering them attractive to pests. Bird seed should therefore be stored in dark places and kept in non-transparent vessels, thus preserving its freshness for our feathered friends.
Damage Mechanisms
- UV light degrades Vitamin A and E within 100 hours exposure
- Light triggers oxidation of seed oils causing rancidity
- Visible spectrum light attracts seed-seeking insects
- Infrared radiation increases container temperatures
Protection Solutions
- Store seed in opaque metal or thick plastic containers
- Use UV-blocking tinted glass for monitoring needs
- Install blackout curtains in storage room windows
- Apply UV-resistant paint to clear plastic bins
Use non-transparent containers for storage over time. Metal bins exclude light completely. Thick plastic bins do not allow light penetration. Avoid using clear types of containers unless you are using UV filtering technology. Zero light is best for preserving nutrients.
Use tinted glass containers for seeds that allow for visual inspection. These filter 99% of the harmful rays and should be stored in a dark cabinet when not checking the seed level. Limiting exposure to under 15 minutes a week should ensure this system works for you.
Observe the storage areas for light leaks. Perform checks at different times of the day to account for changes in natural light. Caulk any gaps around windows and external walls with weather stripping. Keep motion-sensor lights in place for brief checks instead of overhead lights. Similarly, dark areas minimize temperature fluctuations.
Read the full article: Bird Seed Storage: Best Practices Guide
