Rice and wheat are the most important cereal crops which play a significant role to global food security, as they consumed as a staple food near about two-third of the world population. However, the production of these important crops are in threat due to blast-a fungal disease of rice, wheat and grasses, that can destroy enough food supply to sustain millions of people. The rice blast disease is caused by the fungi Pyricularia oryzae (renamed as Magnaporthae oryzae) and first documented in 1637 in China, then in Japan in 1704. In Italy, the USA and India the disease was also identified in 1828, 1876 and 1913, respectively. In Bangladesh the blast disease was relatively unimportant in late sixties and early seventies. The outbreak of blast disease was recorded on 1980 and 1990 in boro season in Bangladesh. Until the 1980s, the blast disease was not known to affect wheat, a main staple crop critical to ensuring global food security. Wheat (Triticum aestivum L.) was first infected in 1985 at Paran� State, Brazil. It has since spread throughout many of the important wheat-producing areas of Brazil and to neighboring South American countries including Bolivia and Paraguay. In South America, wheat blast is caused by isolates of Magnaporthe oryzae (syn. Pyricularia oryzae) known as pathotype Triticum which is a fungal species. Since the outbreak of blast it is a major threat to wheat production in South America. Currently, wheat blast affects as much as 3 million hectares which is seriously limiting the potential production of wheat in the South America. The wheat blast was detected for the first time in Asia in February 2016, with reports of a severe outbreak in Bangladesh. The rice-infecting isolates of M. oryzae are genetically distinct from wheat-infecting isolates and generally do not infect wheat. At field level chemical control is mainly practiced for blast disease management and other options management is mostly tricky to practice. The growing media is an important factor to keep blast out of the constituency.