Orchid doctor

CROWN ROT: In Phalaenopsis Seedlings

Ailments Orchid Doctor

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 3 years ago.

Article Blog   Article Index
A preventive is Benlate as a spray or light drench; 1 ttpg.; A74-300; also, use Natriphene. OR69-272
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Crown Rot

Crown Rot Comments
CROWN ROT: Bacterial Disease Benomyl will not control it, use a bactericide and keep water out of the crowns. OIE87Jan-3 0
CROWN ROT: Characteristics It usually affects phalaenopsis; also called Southern blight (which see); dip plant in Natriphene. S201 0
CROWN ROT: Controls Use a piece of 1/4 inch tubing about 18 inches long for blowing water out of the crowns after watering; mark the mouthpiece end. OIE-85Jy-l 0
CROWN ROT: In Cymbidiums The cause may be 1, too high nitrogen level during cult ivation of the seedlings; use Electric Conductivity reading of not more than 0.6, with a nitrogen to potassium proportion of 1:1:2. 2, Night temperature may be too cold for young plants, so use a minimum night temp erature of 50 Deg F., with a high night temperature of 64 dF to 68 dF and plants will grow better. 3, Too low moisture evaporation from the leaves when root pressure is too high; remove humidity from the greenhouse, 4, Too large pots cause water-logging. 5, Sprinkling water from above with fertilizer is effective in very early stages of growth. 6, Too low pH: calcium and potassium E.G. figures must be equal. OA87-162 0
CROWN ROT: Of Paphiopedilums In nature these plants grow in swamps under rain or under constant spray from waterfalls and they don't develop crown rot; but when water is allowed to stand in their crowns under warm temperatures it occurs. OD69-307 0
CROWN ROT: On Phalaenopsis Benlate stopped the rot but did not stop the plant's growth; if leaves are good, active lateral buds likely remain to continue the growth. A75-500; spray with Physan at 1/2 ttpg.; keikis frequently appear. A75-980 0
CROWN ROT: On Vandaceous Plants Pull the center leaves out of the crown, spray with Physan colution, apply a paste of fungicide powder (Dithane M-45) vitamin/hormone, Super-Thrive and water. A85-818Pull the center leaves out of the crown, spray with Physan solution, apply a paste of fungicide powder and water: (Dithane M-45) plus vitamin/hormone Superthrive. A85-818 0
CROWN ROT: Treatment Use Physan 20 or Natriphene; crown rot is not controlled by Benlate. A77-209 0

New Topics

  1. Jan Andersen asked question Article references? in category General Discussion
  2. Stephen Hodgson asked question Care of Dracuvallia Gualaquiza in category General Discussion
  3. Diane Decoene asked question The Decoene Orchid in category General Discussion
  4. Robert H. Findlay started topic Dif between member photo and "official" photo in category General Discussion
  5. John Small started topic Fungus? Bacteria? Virus? Nothing to worry about? in category Orchid Doctor

New Comments

  1. Mary Lane commented on member plant Den. Emma White by Mary Lane
  2. Carol Holdren commented on topic "Care of Dracuvallia Gualaquiza" by Stephen Hodgson
  3. Carol Holdren commented on topic "Article references?" by Jan Andersen
  4. Carol Holdren commented on member plant Odcdm. Sunlight 'Pesky Panther' by Colin Campbell
  5. Carol Holdren commented on topic "The Decoene Orchid " by Diane Decoene
  6. Alex Maximiano commented on member plant V. bicolor var. Michael Collin by Susan Satterfield
  7. Stefan Neher commented on article "PLEIONES: Starting" by Robert M. Hamilton (Compiler)
  8. John Small commented on topic "Fungus? Bacteria? Virus? Nothing to worry about?" by John Small
  9. Carol Holdren commented on topic "Potting medium" by Richard Sherer
  10. Carol Holdren commented on topic "Dif between member photo and "official" photo" by Robert H. Findlay