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: In Phalaenopsis Seedlings A preventive is Benlate as a spray or light drench; 1 ttpg.; A74-300; also, use Natriphene. OR69-272 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. John Small asked question Which is correct? in category General Discussion
  2. Jean Seymour asked question Can someone give me the name of this orchid? in category Phalaenopsis
  3. Debbie Chase asked question Help to Identify Orchid in category General Discussion
  4. Colin Campbell asked question Unmatched Oncidium Alliance Orchid in category General Discussion
  5. Maria Delaney asked question Double spikes on oncidiums in category Oncidium Alliance

New Comments

  1. Debbie Chase commented on topic "Help to Identify Orchid " by Debbie Chase
  2. Tien Pham commented on member plant V. Yip Sum Wah 'Flame' by Tanya Lam
  3. Carol Holdren commented on topic "Can someone give me the name of this orchid?" by Jean Seymour
  4. Carol Holdren commented on member plant Spathoglotis plicata (Ground Orchid) by Frances LaVigne
  5. Frances LaVigne commented on member plant Grt. Rosy Jewel var. alba by Frances LaVigne
  6. Barry Mellefont commented on article "ANTS: Nesting Between Osmunda and Bark Slab Requires Control Safe for Visiting Hummingbirds" by Robert M. [Bert] Hamilton (Compiler)
  7. Alex Maximiano commented on topic "Unmatched Oncidium Alliance Orchid" by Colin Campbell
  8. Carol Holdren commented on member plant Bc. Jairak Kiku 'Jairak kiku' by Frances LaVigne
  9. Frances LaVigne commented on member plant C. purpurata var. (flammea x sanguinea) by Carol Holdren
  10. Frances LaVigne commented on member plant Ascda. Kulwadee Fragrance by Frances LaVigne