Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:14:52.6697342Z
   3
Papaya ringspot (virus-P) (194)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. On papaya and cucurbits. An important disease. 
  •  Leaves with yellow and green patterns, distorted, small. Older leaves with dark green streaks on the stalks. Ringspots on the fruit.
  • Spread by (i) aphids, (ii) the trade in nursery plants.
  • Cultural control: remove volunteer papaya; restrict people entering plantations; remove disease trees in new plantations, and those in old blocks; netting; resistant varieties offer best (only) solution.
  • Chemical control. not appropriate as aphids pick up virus from disease plants and spread it to healthy trees before insecticides kill them.

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