MILTONIAS: Leaves Show Sudden Brown Patches

Ailments Oncidium Alliance Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 4 years ago.

Article Blog   Article Index
Sample inspected showed no pathogens; the tip burn may have been caused by too strong fertilizer or lack of leaching. A65-910
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Miltonias

Miltonias Comments
MILTONIAS: Brazilian Types Details of the approach to and the problems involved with the breeding of these plants, with pros and cons on many points raised for consideration; refer to A86-892 0
MILTONIAS: Breeding The story in France, where some of the greats come from; a review. W9-57 0
MILTONIAS: Growths Turn Yellowish-green and Fall Perhaps over-watering or accumulating salts in the medium cause this to new growths; try applying water liberally to the dry plants, after 15 minutes repeat. A77-527 0
MILTONIAS: Leaves with Accordion-like Pleating Step up the watering to two or three times weekly. A79-2 0
MILTONIAS: Leaves with Accordion-like Pleats Possibly a physiological disease; may show deficiency of minor elements; it is generally a temporary condition; plants grow out of it. A61-659 0
MILTONIAS: Light Requirements Shade them in the summer; Colombia types like 1,000 to 1,500 fc, and can be grown with paphiopedilums; Brazilian types like about 2,000 to 3,500fc. and can be grown with cattleyas. OD74-101 0
MILTONIAS: Minimum Optimums Temperature: 50 deg.F. nights; relative humidity: 70%; light: summer: 3,000 fcs, winter: 1,500 fcs. AU71-135 0
MILTONIAS: Pleated Leaves Accordion-like pleating is usually linked with under-watering but why does it happen when there is sufficient watering? Water can usually fail to wet overdry bark, which might require soaking for several hours to condition it again. A88-296 0
MILTONIAS: Pleating Leaves The real cause is more complex than ever explained before, it is caused by stress within- the plant brought on by conditions where both the greenhouse and the plant are too dry at the same time, immediately following a wet period for both; opposition is set up between met and dry periods and the plant cells experience a burst of growth followed by a shock of dryness; fluctuations must be avoided and an evaporative cooler is almost a must even in cool-weather country. Poul Hansen (Victoria, B.C.,1988) 0
MILTONIAS: Pleating of Leaves, Accordion Style This is most commonly caused by insufficient watering during the "expansion" stage of the new growths; the cool-growing types do not like to dry out between waterings and if watering is missed for a time, the leaves suffer a set-back. A82-920 0
MILTONIAS: Potting Mix Recommended Two parts chopped osmunda fiber; one part live sphagnum, a small amount of well-rotted cow manure added; water liberally when growing. A64-114 0
MILTONIAS: Rootless Plants Place them in an air-tight plastic bag with some moist sphagnum, inflate it by mouth for the carbon dioxide administered, seal it tightly; repeat fortnightly, re-moistening as necessary; when roots form, repot. A85-966 0

New Topics

  1. Sandi Block-Brezner asked question Brassocattleya hybrid? in category General Discussion
  2. Dean Haas asked question Parentage of RLC Memoria Emma Chen in category General Discussion
  3. John Small asked question Orchid bulb? in category General Discussion
  4. John Small asked question What is this? in category General Discussion
  5. Marilynn Davis asked question Phal. Violacea in category General Discussion

New Comments

  1. Sharie Heckaman commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  2. Dean Haas commented on article "Have Local Orchids to Sell or Trade?" by Sys Admin
  3. Robert H. Findlay commented on member plant B. nodosa by John Small
  4. Eileen Pryor commented on member plant Den. chrysotoxum by Tom Kuligowski
  5. Gustavo da Silva commented on member plant Max. callichroma by Gustavo da Silva
  6. Peter Goodin commented on topic "What is this?" by John Small
  7. Sharie Heckaman commented on topic "Paph. tag Identification" by William Gorski
  8. Robert H. Findlay commented on topic "Unmatched Oncidium Alliance Orchid" by Colin Campbell
  9. Jim Williams commented on topic "Arranges Elro" by Khanh tran
  10. Carol Holdren commented on topic "sideways images" by Robert H. Findlay
  11. John Small commented on topic "Which is correct?" by John Small
  12. Mo Chen commented on member plant Holc. kimballianum by Mo Chen
  13. Fran Fassman commented on orchid E. Thomas Fennell
  14. Lauren Hutchison commented on member plant Oip. Celtic Sun 'Maya' by Dex W
  15. Lauren Hutchison commented on member plant Phalaenopsis Tristar by Lauren Hutchison
  16. Lauren Hutchison commented on member plant Phal. OX Golden Apple 'Honeycrisp' by William Gorski
  17. Debbie Chase commented on topic "Help to Identify Orchid " by Debbie Chase
  18. Tien Pham commented on member plant V. Yip Sum Wah 'Flame' by Tanya Lam
  19. Carol Holdren commented on topic "Can someone give me the name of this orchid?" by Jean Seymour
  20. Carol Holdren commented on member plant Spathoglotis plicata (Ground Orchid) by Frances LaVigne