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Disease Solutions

Disease Nature of damage Control methods
Black Spot (Diplocarpon rosae) Fuzzy edged rounded blackish or purplish spots on the rose leaf. Spots are about 1/8 to ¼ inch in diameter. Apply
  • AVID
  • SCORE
  • ORTIVA
Powdery mildew (sphaerotheca pannosa) Shows of as bumpy blistery surface on young leaves, followed by a white powder like substance occurring on the top surface of leaves and flower buds and occasionally on the stems. Apply
  • SCORE or
  • THIOVIT JET
Downy mildew
(peronospora sparsa)
Leaves commence to wilt turn yellow and fall off the plant. The young shoots also wilt and die back. Can also affect the calyxes of the bud and cause the bud to look distorted. Blackish or dark red/burgundy stains seen on the infected parts Apply
  • RIDOMIL GOLD
  • FOLIO GOLD
  • ORTIVA
  • DACONIL
Botrytis Bligh
(botrytis cinerea)
Set of pink spots on white and lighter colored blooms. Sometimes there is a pink ring that forms around the spots. There is also balling of the buds or failure of the buds to open. Apply
  • SWITCH
  • ORTIVA
  • SCORE
  • TECTO
Iron deficiency   Apply
  • SEQUESTRINE