Some people and most cats have allergic reactions to it. Pyrethrin is effective on most insects, but does not control mites. It rapidly breaks down in sunlight, air and water. Rotenone is derived from the roots of over 68 plant species, and is very toxic to fish, pigs, and cool-blooded animals. It has a short residual.
Rotenone is a broad spectrum poison mainly used to control leaf-eating caterpillars and beetles.
Direct contact may cause skin and mucous membrane irritation. It is more toxic when inhaled. Ryania is a slow acting stomach poison. It has a longer residual than most botanicals. Toxicity to mammals is moderate.