AbstractThe physical properties of papaya mosaic virus are reported. The virus is inactivated by a 10-minute exposure at 60°C. No infection was obtained when juice was diluted up to 1:1000. The virus was completely inactivated in 48 hours at room temperature. Filterability was accomplished but with difficulty through a Seitz germicide filter. The virus was found to lose its infectivity in the leaves when air dried for 48 hours. Aphis spiraeeola Patch retained the virus the first 3 hours but failed to infect a second lot of plants after that time.
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