AbstractTransmission of the mosaic virus present on the sugarcane variety M. 336 is reported. The virus was transmitted mechanically from mosaic-infected M. 336 to the varieties, B.H. 10-12, Sta. Cruz. 12/4, and C.P. 29-291. No transmissions were obtained to the varieties P.O.J. 2878 and P.R. 902, which are resistant to the sugarcane-mosaic virus. The mosaic symptoms produced by the YM-336 virus on B.H. 10-12, Sta. Cruz 12/4, Co. 281, and C.P. 29-291 were indistinguishable from the symptoms produced on these same varieties by the sugarcane-mosaic virus. Comparative studies were made of the physical properties of the M. 336 mosaic virus and the sugarcane-mosaic virus obtained from B.H. 10-12. No differences were observed in the properties of the two viruses. Both were inactivated at a temperature of around 45°C, had a dilution end point of 1:10, and did not survive for more than 24 hours at room temperature. The YM-336 virus was transmitted successfully by means of the corn aphid, A. maidis Fitch, from infected sorghum, B.H. 10-12, and Sta. Cruz 12/4 to the variety M. 336.
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