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: 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. Gail Santini asked question Help ID this yellow phal. in category General Discussion
  2. Debra Johnson asked question Cattleya Alliance Members in category General Discussion
  3. Key Stage asked question Paph Harry Stage in category General Discussion
  4. Chris Tyrie asked question Plants for sale in category General Discussion
  5. Peter Collis asked question Parentage of Vandachostylis Conference Gold in category General Discussion

New Comments

  1. Pam Lipscomb commented on member plant Eny. Exotic Seashell by Steven Kirincich
  2. Pam Lipscomb commented on member plant Lc. Little Oliver by Steven Kirincich
  3. Susan LE commented on topic "Paph Harry Stage" by Key Stage
  4. Susan LE commented on scheduled event "Tamiami International Orchid Festival" by Miami Orchid Society
  5. Susan LE commented on article "Orchid Wiz - what will we do without you?" by Carol Holdren
  6. Susan LE commented on member plant Coel. rochussenii 'Waki' by Melvin Waki
  7. Susan LE commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  8. Susan LE commented on member plant Rlc. Beauty Girl by Blanca Acosta
  9. Mary Lane commented on member plant Den. lindleyi by Mary Lane
  10. António Almeida commented on article "Angraecum Culture with Semi-Hydroponic Techniques" by Tom Kuligowski