BROWN SPOTS: Caused by the Bacteria Pseudomonas Cattleyae

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 7 years ago.

Article Blog   Article Index
It affects phalaenopsis and others; control with Fermate, Benlate, then use Physan. Fi81-218
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: On Cattleyas May be caused by excessive spraying with chemicals. A75-618 0
BROWN SPOTS: On Phalaenopsis 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 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. Mary Lane asked question Orchid roots .com site? in category General Discussion
  2. David George asked question recently purchased orchid shows unstoppable roots in category General Discussion
  3. katherine mott asked question shorter stem with less vigorous blooms in category Phalaenopsis
  4. Glenda Ratliff started topic need info on yellow bird in category General Discussion
  5. Paula Milano asked question Looking to join an orchid club. in category General Discussion
Ask a Question

Start a Topic

New Comments

  1. Melvin Waki commented on topic "Orchid roots .com site?" by Mary Lane
  2. Carol Holdren commented on topic "recently purchased orchid shows unstoppable roots " by David George
  3. Michael Makio commented on orchid V. Beatrice Makio
  4. Carol Holdren commented on topic "shorter stem with less vigorous blooms" by katherine mott
  5. Carol Holdren commented on topic "need info on yellow bird" by Glenda Ratliff
  6. Carol Holdren commented on topic "Looking to join an orchid club." by Paula Milano
  7. Jeanne Uzar Hudson commented on topic "Repotting Large Cattleyas" by Jeanne Uzar Hudson
  8. Jeanne Uzar Hudson commented on member plant Paph. malipoense by Jeanne Uzar Hudson
  9. William Gorski commented on topic "how difficult is it growing from seed" by kevan gregory
  10. Carol Holdren commented on topic "Information " by Carmen Britton
  11. Carol Holdren commented on member plant C. lueddemanniana var. Coerulea, Venosa by Paulo Fiuza
  12. Jeanne Uzar Hudson commented on topic "Banrot 40WP" by Therese Stecher
  13. Maria Lucia Prieto Real commented on orchid Rlc. Village Chief Armani
  14. Mariana Chacon commented on orchid Gom. Jiaho Queen
  15. Roberto Lizama commented on member plant Max. dillonii by Roberto Lizama
  16. Nancy Speedy commented on scheduled event "2024 Orchid show Martin County "Ocean of Orchids"" by Martin County Orchid Society
  17. Jeanne Uzar Hudson commented on member plant Paph. Fanaticum by Jeanne Uzar Hudson
  18. R .Benson commented on member plant Den. Tianmu Green Elf 'Sweetheart' by R .Benson
  19. Alice Walker commented on article "Oeniella polystachys" by Tom Kuligowski
  20. Kathryn Kersey commented on scheduled event "Boca Raton Orchid Society Show & Sale" by Boca Raton Orchid Society