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 4 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. Khanh tran asked question Arranges Elro in category General Discussion
  2. John Small asked question Which is correct? in category General Discussion
  3. Jean Seymour asked question Can someone give me the name of this orchid? in category Phalaenopsis
  4. Debbie Chase asked question Help to Identify Orchid in category General Discussion
  5. Colin Campbell asked question Unmatched Oncidium Alliance Orchid in category General Discussion

New Comments

  1. Carol Holdren commented on topic "Which is correct?" by John Small
  2. Carol Holdren commented on topic "Arranges Elro" by Khanh tran
  3. Carol Holdren commented on member plant Holc. kimballianum by Mo Chen
  4. Fran Fassman commented on orchid E. Thomas Fennell
  5. Lauren Hutchison commented on topic "Unmatched Oncidium Alliance Orchid" by Colin Campbell
  6. Lauren Hutchison commented on member plant Oip. Celtic Sun 'Maya' by Dex W
  7. Lauren Hutchison commented on member plant Phalaenopsis Tristar by Lauren Hutchison
  8. Lauren Hutchison commented on member plant Phal. OX Golden Apple 'Honeycrisp' by William Gorski
  9. Debbie Chase commented on topic "Help to Identify Orchid " by Debbie Chase
  10. Tien Pham commented on member plant V. Yip Sum Wah 'Flame' by Tanya Lam
  11. Carol Holdren commented on topic "Can someone give me the name of this orchid?" by Jean Seymour
  12. Carol Holdren commented on member plant Spathoglotis plicata (Ground Orchid) by Frances LaVigne
  13. Frances LaVigne commented on member plant Grt. Rosy Jewel var. alba by Frances LaVigne
  14. Barry Mellefont commented on article "ANTS: Nesting Between Osmunda and Bark Slab Requires Control Safe for Visiting Hummingbirds" by Robert M. [Bert] Hamilton (Compiler)
  15. Carol Holdren commented on member plant Bc. Jairak Kiku 'Jairak kiku' by Frances LaVigne
  16. Frances LaVigne commented on member plant C. purpurata var. (flammea x sanguinea) by Carol Holdren
  17. Frances LaVigne commented on member plant Ascda. Kulwadee Fragrance by Frances LaVigne
  18. Melvin Waki commented on member plant Hwra. Lava Burst by Jeanne M Uzar
  19. Carol Holdren commented on member plant Den. Ruth Chun's Gemini by Melvin Waki
  20. Samuel Yanos commented on member plant Coel. rochussenii 'Waki' by Melvin Waki