Mexican agriculture present different troubles
among which are included: severe changes in
temperatures during the growing season, a growing
desertification process and dissemination of several
plant diseases characterized for a persistent resistance
to chemical products. Plant diseases are caused by
microorganisms provoking several symptoms like foliar
spots, cell wall degradation, deformations, necrosis,
rottenness of products. In Mexico, agricultural losses
caused by microorganisms vary from 20-100 percent
for some crops, these damages are in some cases higher
than that calculated for around the world, however, in
recent years there is a renewed interest to reduce the
economical losses and to improve the quality and yield
of crops using more friendly environment technologies
under a organic agriculture philosophy.