Virus and viroid diseases are serious constraints to the production and profitability of a wide
range of tropical crops. Many plant virus outbreaks have been recorded in the last two …

Many of the world's most important food crops are grown in the tropics and major crops like
rice, maize, wheat, sorghum, barley, tomato, chillies, okra, peas, peanut, sunflower …

Epidemiology deals with the occurrence of diseases in plant populations over time and
space. A plant virus epidemic results from interactions between virus, host plant, vectors and …

Viral diseases of crop plants cause enormous economic losses as most of the cultivated
areas in India are in subtropical and tropical regions which provide congenial environment …

Contents: Introduction, Economic and Academic Importance, Tungro Epidemics: Facts and
Figures, Symptoms, Transmission and Disease Identification, Nature of Tungro Epidemics …