Diseases of Maize in the Wet Lowland Tropics and the Collapse of the Classic Maya Civilization

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The corn mosaic virus is a devastating viral disease transmitted by the cone borer (Peregrinus maidis) which is confined to the tropical lowlands. Corn and teosinte are the only identified hosts. Therefore, the disease is serious only if the corn is more or less continuously cultivated in humid or irrigated tropical areas (eg Caribbean Islands, Venezuela, Hawaii, Tanzania, Australia). According to the report, this is Mexico of Guatemala and Southern part of Petten. Resistance in maize occurs only in one known form, gene Mv. It gives a high level of resistance, but it does not give immunity. Out of 67 corn races evolved in the northern hemisphere, 63 provided resistance data. It shows that the Mv gene appears in all races of the seven corn evolved in the Caribbean but does not appear in any of the original Mexican tribe or the Central American tribe

Due to the spread of bat virus, corn mosaic virus (MMV), persistent crop failure of corn (Zen mavs L.) is thought to be the main cause of collapse. The relative importance of corn main diseases and pests between petit and highlands and in the surrounding tropical regions was evaluated and the virus was highlighted. The corn mosaic virus is a devastating viral disease transmitted by the cone borer (Peregrinus maidis) which is confined to the tropical lowlands. Corn and teosinte are the only identified hosts. Therefore, the disease is serious only if the corn is more or less continuously cultivated in humid or irrigated tropical areas (eg Caribbean Islands, Venezuela, Hawaii, Tanzania, Australia). According to the report, this is Mexico of Guatemala and Southern part of Petten. Resistance in maize occurs only in one known form, gene Mv. It gives high level of resistance but no immunity