books.google.com - Heteropterans regularly cause a wide variety and large number of problems for humans - at times on a catastrophic scale. The 37,000 described species of this suborder including many pests, disease transmitters, and nuisances exist worldwide, inflicting damage on crops, forests, orchards, and human life....http://books.google.com/books/about/Heteroptera_of_Economic_Importance.html?id=AVcBI0GL-fQC&utm_source=gb-gplus-shareHeteroptera of Economic Importance