Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:13:12.6563573Z
   3
Ginger soft rot (162)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. In tropics and sub-tropics. On ginger, taro, giant taro, Xanthosoma, beans and capsicum (see Fact sheet no. 44). Many kinds of seedlings are susceptible to damping-off disease in the nursery (see Fact Sheet No. 47).
  • A water mould, an oomycete, not a fungus, living in soil on remains of crops, weeds, or as resistant spores.
  • Swimming spores infect roots, buds on rhizome or the stems of shoots. Stems collapse, and leaves yellow and die. Patches of yellow develop in the field.
  • Spread occurs in soil water to neighbouring plants, and long distances in 'seed' used for planting.
  • Cultural control: raised beds with deep ditches to drain soil and isolate disease outbreaks; clean seed from healthy crops; weed; 3-4-year crop rotation.
  • Chemical control: metalaxyl and phosphorous acid (possibly), but unlikely to be economic.

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