Agricultural technologies, unlike many other technologies, have a major impact on human being and other life forms. This is because of the huge magnitude of this human activity - farming is spread over a major part of this planets land and is the primary occupation of millions of people, but a great portion of the agricultural crops have been affected by the various fungal, bacterial and viral diseases. Among the different diseases, the plant viral disease causes the great damage to the agricultural and horticultural crops. Viruses are very small (submicroscopic) infectious particles composed...