👉 Benomyl is a synthetic insecticide that was introduced in 1970. It is commonly used to treat aphids and other pests on crops. The active ingredient of benomyl is propenylbutyrate, which is a derivative of butanone and phenol. Benomyl has been found to be effective against various types of aphids, including the common root aphid (Aphelenchoides oraphis), which causes damage to crops such as