https://en.wikipedia.org/wiki/Chrysanthemum
https://en.wikipedia.org/wiki/Catharanthus_roseus
Recursos
Varios temas por Purdue >> https://ag.purdue.edu/hla/fruitveg/Pages/default.aspx
Biological Control>>> enemigos naturales de plagas
http://www.biocontrol.entomology.cornell.edu/ag.php
