Which storage guidance is typically required on pesticide labels to protect stability?

• A. Store in a warm, sunny place.
• B. Store under specified temperature, protect from light, control humidity.
• C. Never check humidity.
• D. Only store upright.

Answer: (B)

Stability of pesticides hinges on keeping to environmental conditions like temperature, light exposure, and humidity. Labels typically require storing under the specified temperature range, protecting the product from light, and maintaining proper humidity levels. Temperature extremes can speed up chemical degradation or cause formulation changes; light can cause photodegradation; moisture can promote hydrolysis or affect packaging and potency. Following these guidance helps keep the product stable and effective. Storing in a warm, sunny place would increase temperature and light exposure, accelerating degradation; ignoring humidity or storage orientation would not adequately protect stability.