Different formulations of the same insecticide often vary considerably in their toxicity to bees. Granular insecticides generally are not hazardous to honey bees. Dust formulations (seldom used today on commercial field crops) are typically more hazardous than emulsifiable concentrates because they adhere to the bee’s body hairs and are carried back to the beehive. Wettable powder and flowable formulations essentially dry to a dust-like form which foragers can carry to the hives. Likewise, microencapsulated insecticides can be collected by foragers …
What steps can beekeepers take to protect their colonies from pesticide injury?
Choose low hazard apiary locations. Do not place bees adjacent to crops likely to be sprayed with an insecticide. Know the risks. Many crop pests can be controlled without endangering bees. Attend crop pest management training sessions to stay informed about crop pests and control measures used by growers and applicators. These sessions also provide an opportunity to establish communication links with growers and applicators. Maintain positive working relationships with applicators. Risk management decisions can best be made when both …
How can farmers, gardeners and applicators reduce risks of honey bee injury from pesticide applications?
Do not treat fields in bloom. Be especially careful when treating crops, such as alfalfa, sunflowers and canola, which are highly attractive to bees. Insecticide labels carry warning statements about application during bloom. Always read and follow the label. Examine fields and field margins before spraying to determine if bees are foraging on flowering weeds. Milkweed, smartweed and dandelion are examples of common weeds that are highly attractive to honey bees. Where feasible, eliminate blooming weeds by mowing or tillage …