Due to unabated rise in population, more so in Afro-Asian
and Latin American countries food security has become a matter
of concern. It is expected that global population may reach 10
billion and therefore globally all efforts are to be made to produce
enough food to meet the growing requirement of the population.
Unabated rise in population is also responsible for land-crunch,
making the task a little difficult. In addition, changing climate and
more importantly plant pests and diseases pose serious threat
to food security. Plant diseases appear to be the biggest threat to
food security. Several diseases in the past, such as late blight of
potato in 1845 in Ireland, Coffee rust in Sri Lanka in 1876, Brown
Leaf Spot of rice in 1942 in India caused untold miseries.