PSEUDOBULBS: Shrivelling

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 7 years ago.

Article Blog   Article Index
On cattleyas this means that humidity is low or that the potting medium is loose and is providing poor moisture distribution. A75-876
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Pseudobulbs

Pseudobulbs Comments
PSEUDOBULBS: Black A fungus disease causes this on cattleyas; control it best by watering in the morning and provide good air circulation. A68-1107 0
PSEUDOBULBS: Blackening and Dying It is probably one of the black rot diseases; try Banrot at 1 ttpg. or Benlate at 1/2 ttpg. plus Truban at 1 ttpg. mixed. A76-403 0
PSEUDOBULBS: Broken To prevent infection expose the broken surface to air and allow the cells to dry. A71-1021 0
PSEUDOBULBS: Cracking Cattleyas sometimes develop horizontal cracks or breaks in their pseudobulbs and the upper part can break off under the weight of the flowers; the cause in not known; it may be genetic; illus. AH59It may be inherited or caused by the lack of boron; apply a solution of 1 tpg. of boric acid four or five times a year. S215; this will kill the plant OWD 0
PSEUDOBULBS: Disfigured by Horizontal Cracking These unusual splits are physiological disorders which weaken the pseudobulb: and easily cause breaking, sometimes by its own weight. A85-1335 0
PSEUDOBULBS: Dormant Too many of them on a plant often indicates that a poor root system exists. OD68-172 0
PSEUDOBULBS: Formation Short very fat ones on cattleyas are possibly genetic in origin; it may be caused by a deficiency of boron; make 1 tpg. of Boric acid and put 2 ttpg. of this in each gal. of fertilizer solution and use it every two months, A71-917 0
PSEUDOBULBS: Mature What constitutes maturity: it is when neither bulb or leaf is expanding, when roots are active, or inactive, but healthy during their rest period; ripe; fully made up. A70-535; OR78-177 0
PSEUDOBULBS: Rootless They still serve a purpose; if they have leaves and are plump, they contain and produce food. A75-803; A80-356 0
PSEUDOBULBS: Rotting When this happens, open up the potting mix if it is dense; watch for water with nutrient in the leaf joints which can cause bacterial damage; peat moss and sand in t he mix can also contribute to it. AU84-204 0
PSEUDOBULBS: Sheath Technically called the cataphyl, the membraneous covering is a protection to the new bulb and especially to the new eye; remove it only if it is loose. A68-7 0
PSEUDOBULBS: Shrivelling During Rest Period Backbulbs may shrivel but those with leaf should not; you do not have to water on a humid cloudbathed tropical mountain.' A70-535 0
PSEUDOBULBS: Twisted Bulbs on Cattleyas These can develop for no apparent reason, except that water lodging in immature growths may be the cause. A85-832 0
PSEUDOBULBS: Wrinkled Back bulbs three to four years old show the natural aging process; it is hastened by over-watering and poor cultural practices. A78-309 0

New Topics

  1. Nancy Shapiro asked question Where did you find this type of orchid pot? in category General Discussion
  2. Charles H Wood asked question Orchids wanted St.Croix usvi in category General Discussion
  3. William Gorski asked question Is this a species or Primary Hybrid? in category General Discussion
  4. Therese Stecher asked question Banrot 40WP in category General Discussion
  5. Chen Jimmy asked question How to determine the species composition? in category General Discussion

New Comments

  1. Dianne Mayne commented on topic "Banrot 40WP" by Therese Stecher
  2. Linda Thorne commented on member plant Paphiopedilum Munchkin Mopsi Aru by Linda Thorne
  3. Carol Holdren commented on topic "Orchids wanted St.Croix usvi" by Charles H Wood
  4. William Gorski commented on topic "Is this a species or Primary Hybrid?" by William Gorski
  5. Henry Shaw commented on member plant Coel. Jannine Banks 'Snow White' by Henry Shaw
  6. Carol Holdren commented on topic "Trichocentrum luridum" by Danny Lyon
  7. Carol Holdren commented on topic "What is the culture for Cattliante Chongkolnee" by Mike Minney
  8. Carol Holdren commented on topic "How to determine the species composition?" by Chen Jimmy
  9. Lois Lane commented on member plant Ctna. Why Not by Alex Maximiano
  10. Carol Holdren commented on topic "SSPECIES OF ORCHID" by JENNIFER CHARMAN
  11. Carol Holdren commented on topic "Why can't I post on this site? " by Lois Lane
  12. Carol Holdren commented on topic "Historic Cattleya" by Karen Johansen
  13. Carol Holdren commented on topic "Encyclia aspera" by William Woodcock
  14. Jim McGuinn commented on topic "Designing a greenhouse for orchid growing" by Ron Hellendall
  15. Mark Bennett commented on member plant Sarcochilus Newbold Alta 'SBC092' by Mark Bennett
  16. Mark Bennett commented on member plant Sarcochilus Newbold High Noon 'SB140' by Mark Bennett
  17. Carol Holdren commented on orchid Epi. Moonlight Firefies
  18. Jeanne Uzar Hudson commented on topic "Paph Support" by Nicholas Levendosky
  19. Rosemary Chenery commented on topic "Lost tag - can anyone provide a name" by Rosemary Chenery
  20. Taylor Savage commented on topic "Myrmecatavola Frances Fox" by Elizabeth Wagner