Rotenone kills bees, is highly toxic, especially when combined with pyrethrins, and can enhance the onset of Parkinson's disease, Zaruk and other experts note.

Is rotenone harmful to bees?

Rotenone and pyrethrum are both derived from plants and are considered to be organic products. Both are used as insecticides to kill farm and garden insects. ... Rotenone is considered to be safe for use around bees and is only slightly toxic to birds.

Is rotenone safe to use?

The World Health Organization classifies rotenone as moderately hazardous because it may be absorbed by ingestion or inhalation. Inhalation of concentrated rotenone in the powder form is the most direct threat to humans, and caution is required during handling.