Quad
open-field crops, blossoming in spring. Crops Stone fruits, pome fruits, strawberry, blueberry. Mode of action After introduction of the hive, worker bumblebees [...] pollinating the flowers while at the same time collecting pollen to feed the brood. More workers emerge from the brood in the weeks after the introduction [...] weeks the colony will reach its maximum size and starts declining in size and pollination activity. Colony development depends on environmental conditions