The emergence of use of biological herbicides

Serious attention to hazardous chemical pesticides began with publication of the book “Silent Spring” by Rachel Carson in 1962. Scientists believe that agriculture had the greatest impact on the environment. The most reliable evidence comes from application of million tons of chemical fertilizers and pesticides with short or long adverse effects on ecosystem. Therefore, it is essential to implement effective strategies such as biological materials to reduce chemical pollutants. Unfortunately, there is very little information about the practical use of these valuable resources. This article compares chemical and biological herbicides in brief and may be useful for introducing young scientists with non-chemical weed control methods and encourage them to research the issue.