Pyrethrins Sentence Examples

Unfortunately, the natural pyrethrins are unstable in light; they are of limited use in agriculture due to their rapid breakdown.

Adult fleas can be killed with products that contain pyrethrins, but pre-adult fleas and eggs need to be treated with a product that contains methoprene to halt their growth.

Insecticidal pyrethrins (0.33%) (RID, A-200) are extracts from chrysanthemum flowers.