Which pesticide formulation is considered the least hazardous for bees and other pollinating insects?

Granular pesticide formulations are considered the least hazardous for bees and other pollinating insects primarily due to their application method and lower potential for exposure. Granular pesticides are often applied directly to the soil or plant base, minimizing the likelihood of drift into flowering plants where pollinators are active. As these formulations generally do not produce airborne particles that can easily reach bees, they reduce the risk of contact or ingestion by these beneficial insects.

Moreover, granular formulations tend to have lower volatility compared to liquid or emulsifiable concentrate formulations. This reduced volatility decreases the chance of pesticide vapors impacting pollinators after application. In contrast, liquid formulations and emulsifiable concentrates can pose a higher risk because they can more easily drift with the wind and be carried to areas where bees are foraging.

While aqueous formulations might also be considered less hazardous, they still have potential implications for pollinators, especially during flowering periods. Understanding the modes of action and the ways different formulations interact with the environment helps in making informed decisions that protect pollinators while effectively managing pests.