With any sprays that are applied around the bees whether chemical, or organic, including herbicides, pesticide, fungicides, fertilizers, or any others. There are more than the one way for it to come to be in the hive.The three most common ways are. 1 In the nectar and on the pollen being brought in to the hive by the bees. 2 From the drifting of the mist or powder into the hive during the application process. 3 From contaminated water that the bees bring back into the hive from ponds, standing water and dripping from sprayers after the application. But it is also the direct spraying of the bees as they are foraging in the field. as well as when liquid sprays are used and diluted with water and sprayed on as a mist, this moisture attracts the bees to it as a water source and bring it into the hive.
Method and timing of applications becomes an important issue in applying sprays and powders. We don't want any thing drifting towards the hive when it is being sprayed. We don't want to be spraying on the bees so spray when the bees are not active. Spray early enough before the bees start to fly so the water mist that is carrying the chemical has time to dry before the bees begin actively foraging for the day. By eliminating as much standing stagnate water and ensuring the bees have access to clean fresh water.