Nowadays, chemical pesticides are the traditional solution to weed and pest problems, and although they have saved lives and crops, the greatest risk to our environment and our health comes from their use. Many significant problems from their use include con‐ tamination of the environment, the development of pesticide resistance in the target pest, the recovery of pest species, the phytotoxicity in crop fields, and the unacceptably high levels of pesticide/commodity residue in food. There is evidence, however, that unless an improved weed and pest control system is adopted, these problems are expected.
