When using pesticides toxic to bees, when is the safest time to spray to avoid bee activity?

The safest time to spray pesticides that are toxic to bees is during the night or early morning. This period is chosen because bees are less active or not active at all during these times. Bees typically leave the hive early in the morning to forage for nectar and pollen, but they usually return before dusk. Spraying at night or in the early morning minimizes the risk of exposing bees to harmful chemicals, as they are still inside their hives or just beginning their activities.

During midday, bees are at their peak foraging activity, making this a risky time to apply pesticides. Late afternoons can also be problematic, as many bees are still out collecting resources before returning to the hive for the night. Cool, cloudy days may reduce bee activity somewhat, but they can still be active and exposed during the day, especially if temperatures warm up or if it’s a mild day. Therefore, spraying at night or in the early morning is the most effective strategy to protect bee populations.