RUSTS: Uredo Behnickiana, Etc.

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 5 years ago.

Article Blog   Article Index
First seen on Phaius grandifolius; no control once it is established; destroy all infected plants; try Plantvax 75W at 2.5 ttpg.; varying results have been reported with it. B13; BU14+
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Rusts

Rusts Comments
RUSTS: Controls Captan and Ferbam are not used with official approval in combatting them, and to those can be added Fore/ Dithane for use on dendrobiums; some of the better ones, not yet legal are Bayleton, Triforine/Funginex and they might be worth looking for. AH86-70 0
RUSTS: Frequently Found in the Wild Some imported plants may carry rust fungi; can be seen as masses of yellow to orange spores; treat with copper containing fungicide, such as Bordeaux mixture or Tersan. A66-558; A73-815; S203; copper sulfate is very toxic to plants. OWD 0
RUSTS: On Leaves of Several Genera Rust disease is caused by a fungus, the appearance of rust on plants may also be caused by unstable iron in the water supply; a specimen leaf should be checked by the Dept. of Agriculture; address given. A73-615 0
RUSTS: Sphenosphora Kevorkianii, Etc. Found on Epid. tampense; small orange areas or pustules under the leaves; they turn black, are sometimes concentric; only the leaves are attacked; cut them off; try Plantvax-75W, or ferbam, or captan. B15; BU15 0
RUSTS: Sphenosphora Mera Attacks various orchids; on cycnoches it is found under the leaves as tiny raised cinnamon brown areas; when ruptured they spread spores; remove and burn plants; or spray with ferbam, or Plantvax 75W at 2% ttpg, monthly. B17; BU18 0
RUSTS: Sphenosphora Sp. and Uredo Sp. They are usually orange, brown rusty spots found on many genera; cut it off and burn the pieces of infected leaves, or better still, destroy the whole plant; spray with Ferbam or Zineb; Plantvax-75W may be successful. "AH32+ 0
RUSTS: Sphenospora Saphena Some oncidiums in Florida have been infected; show tiny raised orange areas under leaves; aging, the pustules become dark brown; remove and destroy all infected plants; spray surrounding ones with ferbam; spray small plants with Plantvax 75W monthly at 2% ttpg. BU17 0
RUSTS: Uredo Epidendri Infrequently found in Florida on Oncid. cavendishianum; shows raised brown pustules with reddish border, first on the underside of leaves; destroy all plants showing infection; protectively spray other plants with ferbam at 1.5 ttpg weekly or Plantvax 75W at 2.5 ttpg.every thirty days. B16, BU17 0
RUSTS: Uredo Nigropunctata Occurs infrequently in Florida; it forms conspicuous irregular orange and black pustules on both surfaces of the leaves; cut them off and destroy them; try ferbam at 1.5 ttpg. weekly, or Plantvax 75W at 2.5 ttpg. twice, 30 days apart, BU19 0
RUSTS: Uredo Oncidii Many plants are attacked; it produces powdery masses of yellow to yellow-orange spores; spreads easily; weakens plants; treat with a copper-containing fungicide, or Tersan; N319 (as Hemeleia americana); destroy the plant; spray all others with ferbam. BU61 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. Susan LE commented on member plant QF Makani by Tanya Lam
  2. Pam Lipscomb commented on member plant Eny. Exotic Seashell by Steven Kirincich
  3. Pam Lipscomb commented on member plant Lc. Little Oliver by Steven Kirincich
  4. Susan LE commented on topic "Paph Harry Stage" by Key Stage
  5. Susan LE commented on scheduled event "Tamiami International Orchid Festival" by Miami Orchid Society
  6. Susan LE commented on article "Orchid Wiz - what will we do without you?" by Carol Holdren
  7. Susan LE commented on member plant Coel. rochussenii 'Waki' by Melvin Waki
  8. Susan LE commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  9. Susan LE commented on member plant Rlc. Beauty Girl by Blanca Acosta
  10. Mary Lane commented on member plant Den. lindleyi by Mary Lane
  11. António Almeida commented on article "Angraecum Culture with Semi-Hydroponic Techniques" by Tom Kuligowski
  12. Pam Lipscomb commented on member plant Blc. Walden's Glen by Jeanne M Uzar
  13. Pam Lipscomb commented on member plant Blc. Oconee 'Mendenhall' by Jeanne M Uzar
  14. Pam Lipscomb commented on member plant Blc. Memoria Helen Brown var. Sweet Afton by Jeanne M Uzar
  15. Pam Lipscomb commented on member plant Blc. Magic Meadow 'Napolean' by Jeanne M Uzar
  16. Pam Lipscomb commented on member plant Ctt. Fire Dance 'Patricia' by Robert Rand
  17. Pam Lipscomb commented on member plant Bsn. Maikai by Robert Rand
  18. Pam Lipscomb commented on member plant Rth. Love-Love x Rth. Tsiku Lily by Robert Rand
  19. Carol Holdren commented on topic "Cattleya Alliance Members " by Debra Johnson
  20. Stefan Neher commented on orchid Bl. Joanne Singer