RUSTS: Frequently Found in the Wild

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 8 years ago.

Article Blog   Article Index
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
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: 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 Behnickiana, Etc. 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+ 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. James W McCully asked question How to read archived articles ? in category General Discussion
  2. David George asked question recently purchased orchid - what to expect in category General Discussion
  3. Danielle Carbonneau asked question phalaenopsis, dendrochum and Odontoglossum in category Phalaenopsis
  4. Nicholas Filannino asked question Phalaenopsis William Kistler? in category General Discussion
  5. Mark Farran asked question How to open and read articles listed in category General Discussion
Ask a Question

Start a Topic

New Comments

  1. Louis Wilson commented on member plant E. alata f. alba by Louis Wilson
  2. Julie Ellner commented on member plant Phal. amabilis var. formosanum by Vickie Seibert
  3. Julie Ellner commented on member plant Rlc. Green Dragoon 'Mendenhall' by Jeanne Uzar Hudson
  4. Danielle Carbonneau commented on member plant Ons. Catatante 'Los Roble' by Henry Shaw
  5. Barry J Silver commented on orchid Lyon. SunCoast Pink Passion
  6. Carol Holdren commented on topic "Phalaenopsis William Kistler?" by Nicholas Filannino
  7. Carol Holdren commented on orchid Colm. Eric Gabriel Heines
  8. Carol Holdren commented on topic "Cattleya little susie" by Juliann Eckhard
  9. Carol Holdren commented on member plant Bc. Morning Glory by Chris Siolo
  10. R .Benson commented on member plant Kir. New Hybrid (Fred Clarke) SVO9831 by R .Benson
  11. Carol Holdren commented on topic "Blooming Stenglottis Venus “jamboree “" by John Urey
  12. Jeanne Uzar Hudson commented on member plant Lc. Canhamiana var. coerulea 'Cobalt' by Jeanne Uzar Hudson
  13. Jeanne Uzar Hudson commented on member plant Sns. gemmata by Jeanne Uzar Hudson
  14. Stefan Neher commented on topic "Orchid roots .com site?" by Mary Lane
  15. Kevin Barry commented on member plant Bul. Tammie Sue Pernas by Tony Pernas
  16. Linda Hartman commented on member plant Ctt. Final Blue by Linda Hartman
  17. Kevin Bergeson commented on member plant Paph. rothschildianum by Kevin Bergeson
  18. Carol Holdren commented on topic "recently purchased orchid shows unstoppable roots " by David George
  19. Michael Makio commented on orchid V. Beatrice Makio
  20. Carol Holdren commented on topic "shorter stem with less vigorous blooms" by katherine mott