BROWN SPOTS: On Phalaenopsis

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 4 years ago.

Article Blog   Article Index
Bacterial rots are caused by cool, moist conditions; keep foliage dry and lower the humidity at night; follow scrupulous sanitary measures; the fungicide Subdue is effective but expensive at $75.00 a quart. A85-605
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Brown Spots

Brown Spots Comments
BROWN SPOTS: Bacterial Disease Pseudomonas cattleyae; affects many genera; starts as soft water-soaked lesion becomes brown or black; advances rapidly; kills seedlings; occurs on leaves of older plants; spreads to growing point; exudates; highly infectious; on cattleyas it is limited to older leaves and is generally not fatal; spray with Physan at 1.25 tpg. monthly; use Natriphene three-quarters tpg. (1:2000) or Tersan 75. B39; BU48 0
BROWN SPOTS: Caused by Bacteria Phytomonas (Pseudomonas?) cattleyae; affects cattleyas and others, especially serious on phalaenopsis and young seedlings in community pots; soak plant in Anti-Damp or Natriphene. A73-815 0
BROWN SPOTS: Caused by the Bacteria Pseudomonas Cattleyae It affects phalaenopsis and others; control with Fermate, Benlate, then use Physan. Fi81-218 0
BROWN SPOTS: On Cattleyas May be caused by excessive spraying with chemicals. A75-618 0
BROWN SPOTS: Pseudomonas Cattleyae The most common and the most severe disease of phalaenopsis; water-soaked lesions show first; it advances rapidly; it kills the plant when it reaches the crown; splashing water spreads it; spray with Physan 1/2 ttpg.; repeat. AH86-75 0

New Topics

  1. William Gorski asked question Dendrobium Identification in category General Discussion
  2. Darrin Duling asked question Stenocoryne x Bifrenaria = Grex name? in category General Discussion
  3. Charles Vella started topic Orchid list Cold/Warm in category General Discussion
  4. Jan E Teitsworth asked question Can anyone identify this orchid? in category Oncidium Alliance
  5. Marianna Hynson asked question Need Help Identifying this Orchid in category General Discussion

New Comments

  1. Charles Vella commented on topic "Orchid list Cold/Warm" by Charles Vella
  2. Sandi Block-Brezner commented on topic "Brassocattleya hybrid?" by Sandi Block-Brezner
  3. Robert H. Findlay commented on topic "looking for info about an unregistered cattleya" by bob lewis
  4. james Hu commented on orchid Den. vannouhuysii
  5. Chase Hubbard commented on member plant Hknsa. Sogo Doll by Tom Kuligowski
  6. Colin Campbell commented on topic "Can anyone identify this orchid?" by Jan E Teitsworth
  7. Sharie Heckaman commented on member plant NEW HYBRID (Lc. Cornelia 'Floralia' x Lc. Moonlight Dream 'SVO Moonlight Kiss' AM/AOS) var. Compact by Vickie Seibert
  8. Carol Holdren commented on member plant Lc. Memory of PienPien Wei by Robert Rand
  9. Robert Rand commented on member plant Bc. Yellow Bird by John Small
  10. Sharie Heckaman commented on member plant Btcm. Hwuluduen Chameleon by Diana Sammy
  11. Sharie Heckaman commented on member plant (C. Leoloddiglossa var. coerulea 'SVO Baby Blue' x C.Interglossa aquinii var. coerulea 'SVO') 'SVO' by Joshua J Peterson
  12. Sandi Block-Brezner commented on topic "Need Help Identifying this Orchid" by Marianna Hynson
  13. Sandi Block-Brezner commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  14. Vickie Seibert commented on member plant Phal. Ember 'Carmela' by Vickie Seibert
  15. John Small commented on member plant B. nodosa ''H&R' 4N x 'Mas Mejor'' by John Small
  16. Robert H. Findlay commented on topic "Parentage of RLC Memoria Emma Chen" by Dean Haas
  17. Dean Haas commented on article "Have Local Orchids to Sell or Trade?" by Sys Admin
  18. Eileen Pryor commented on member plant Den. chrysotoxum by Tom Kuligowski
  19. Gustavo da Silva commented on member plant Max. callichroma by Gustavo da Silva
  20. Peter Goodin commented on topic "What is this?" by John Small