Volatility is defined as what?

• A. The potential for spray droplets to go from liquid to vapor particles. Pesticide formulation has a large effect on volatility, as does temperature and humidity. High temperature and low humidity = higher risk of volatility
• B. The rate of evaporation of water from droplets
• C. The speed at which droplets exit the nozzle
• D. The toxicity of the pesticide

Answer: (A)

Volatility is about how readily the pesticide formulation can vaporize, turning from liquid to gas under environmental conditions. It reflects the pesticide’s tendency to become vapor, which is influenced by how the product is formulated and by factors like temperature and humidity. Higher temperatures and lower humidity increase the likelihood that droplets will volatilize, raising the risk that vapor can drift away from the target area or be inhaled.

The other ideas don’t fit volatility. Evaporation of water from droplets is about water, not the pesticide itself. How fast droplets leave the nozzle describes application speed, not the pesticide’s tendency to vaporize. Toxicity concerns harm potential, not how easily the pesticide becomes vapor.