BUDS: On Cattleyas, Turn Yellow and Drop

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 6 years ago.

Article Blog   Article Index
The air is possibly polluted with ethylene and automobile fumes, or burning wood, an unvented heater, insufficient light, injury caused by snails, slugs, insecticide or pesticides. A76-507; A76-698
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Buds

Buds Comments
BUD INITIATION: How to Induce? When sheath is on plant, give good light intensity, short days, cool nights below 60 to 62 deg. F.; for Cattleya mossiae provide below 56 deg.F. A70-1099 0
BUD REMOVAL: Will Size of Cymbidium Flowers Be Improved If Alternate Buds Are Removed? No appreciable change will occur; de-budded spikes are excluded from judging. A70-235 0
BUD ROT: In Paphiopedilums Caused by Erwinia cyprepedii which also commonly attacks base of leaves; watering procedures do not seem to be a factor; strong air movement 24 hours a day controls it partly; drenching plants with Physan 20 might help. A71-314 0
BUDS: Black Inside Cattleya Sheaths Rather common condition; to avoid it, when the buds appear clearly in shadow, cut off 1/2 inch from top of sheath; probably caused by sudden temperature change. A81-1436 0
BUDS: Blasting In addition to ethylene, it can be caused by drying out from either high or low temperature, or low humidity. A86-1140May be caused by air pollution, or too high or too low temperatures; in cattleyas it is frequently caused by moisture condensing inside the sheath where the temperature drops widely between day and night. OIE85Mar-4 0
BUDS: Brown, Spotted and Chewed Caused by possible infestation of snails; use Sevin or Zectran. A77-314 0
BUDS: Cattleyas Injury by two-spotted mites, illus. in A73-714 0
BUDS: Deterioration in Sheath It is not a disease; plant probably lacks food reserves if it has been grown under too much shade; save buds by removing sheaths before they turn brown. A71-535 0
BUDS: Fail to Open, Dry Up and Fall Off Gas heater should be checked for ethylene emission. A77-449 0
BUDS: Initiation Within Cattleya Sheaths In response to a signal, probably of chemical origin, the base of sheath develops rudimentary flower buds; the chemical signal is a hormone triggered by day length shorter than a critical length determined by the plant, and conditioned by a favorable temperature. A71-535 0
BUDS: In Sheath on Cattleyas Stopped Growing Could be cultural or genetic; no suggestions to offer; if buds are alive remove sheath. A75-1007 0
BUDS: Kept Closed by Sticky Secretions Excessive sugar is produced, sometimes following too much light, probably on a clear frosty morning, so a slight increase in the morning temperature should solve the problem; raise the thermostat a notch. OR81-110 0
BUDS: Not Opening Fully Phalaenopsis amabilis: suspected cause is abnormally low humidity; try syringing buds to dissolve nectar. A77-702 0
BUDS: On Cattleya Plants Shrivelled and soft, drop when touched; probably ethylene toxicity is the cause; check valves and controls on burner of dynavent heater using propane as fuel. A73-155 0
BUDS: On Paphiopedilums, They Turn Brown, Working Down the Stem Probably caused by bacteria; provide good air movement; water early in the day; for additional protection soak plants entire in Natriphene 1:2000 for 15 to 30 minutes. A72-534 0
BUDS: On Phalaenopsis They Blast and Drop Ethylene only is the cause, sometimes intensified by atmospheric conditions. A68-811 0
BUD STEMS: They Curl Before Emerging From Sheath Possible sticking of buds in sheaths is due to failure of the sheaths to open in a dry atmosphere. A73-208 0
BUDS: Turned Black on Cattleya Skinneri After Half-opening Probably caused by too much cold. A76-206 0

New Topics

  1. Stephen Dorsey asked question Articles posted in category General Discussion
  2. Elizabeth Wagner asked question Myrmecatavola Frances Fox in category Orchid Doctor
  3. Burt Holstein started topic Error in plant origination in category Cymbidiums
  4. loan le started topic help with Clowesia Grace Dunn Chadd Ford Mericlone in category General Discussion
Ask a Question

Start a Topic

New Comments

  1. Linda Hartman commented on member plant Rlc. Hsinying Williette by Mary Lane
  2. Carol Holdren commented on topic "Articles posted" by Stephen Dorsey
  3. Mary Lane commented on member plant Phal. I-Hsin Rose Milkshake by s mcn
  4. William Gorski commented on member plant Bc. Memoria Nancy Ginoccho by William Gorski
  5. Shawn Dvorak commented on member plant Bulb. mucronatum by Shawn Dvorak
  6. Diana Lenartiene commented on scheduled event "Hoot Loves Orchids" by Port Saint Lucie Orchid Society
  7. Carol Holdren commented on topic "Orchid Species in the Philippines" by unknown user
  8. Dennis Andison commented on article "Orchid Wiz - what will we do without you?" by Carol Holdren
  9. loan le commented on topic "help with Clowesia Grace Dunn Chadd Ford Mericlone" by loan le
  10. Carol Holdren commented on topic "Mediocalcar decoratum (Candy corn orchid) help" by Jason heeres
  11. Carol Holdren commented on topic "How do I get my orchid ID?" by GIBSON PWASHIKAI
  12. Arne Schon commented on orchid B. perrinii
  13. Linda Thorne commented on member plant Rlc. Williette Wong 'The Best' by Linda Thorne
  14. Carol Holdren commented on topic "Z. Redvale Jasmyn" by Shaun Bloodworth
  15. Marie H Miller commented on member plant C. aclandiae by Kerrin Samm
  16. Linda C Clark commented on orchid C. Madeleine Knowlton
  17. Heather Williams commented on member plant Phal. equestris '‘996’' by Cara Anderson
  18. Heather Williams commented on orchid Paph. Vintner's Treasure
  19. Heather Williams commented on member plant Bct. Yuan Nan Mini 'Queen Anne' by Linda Thorne
  20. Heather Williams commented on member plant Pths. racemiflora 'Seagrove Golden Fiddles' by Linda Thorne