Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:13:47.6453725Z
   3
Lettuce Sclerotinia collar rot (129)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Worldwide distribution. On many vegetables, fruit and field crops. Important disease in sub-tropical countries.
  • Cottony growth causes rots of roots, stems, leaves and fruits; also, damping–off. Black, survival bodies ('sclerotia') form, later producing a toadstool and liberating spores infecting dying leaves and flowers.
  • Cultural countries: wide spacing; trellis; prune lower leaves/branches; crop rotation; soil sterilisation; add manures; mulch, do not harvest and pack in wet weather; plough in trash or collect and burn.
  • Chemical control: seed treatments: thiram or captan; in the field: benzimidazole, strolbilurin or triazole fungicides.

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