ALGAE: On Plant Leaves

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 6 years ago.

Article Blog   Article Index
Caused probably by too little light; low intensity of fertilizer on leaves promotes growth; it can cut down on photosynthesis. F68-187
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Algae

Algae Comments
ALGAE: Control Use Physan 20, at the rate of 1/2 tpg. A78-495 0
ALGAE: Control in Cattleya House Physan 20 may be too expensive; Phygon is cheaper for use on evaporative cooling pads. A74-969 0
ALGAE: Control in Growing Trays After watering plants, rinse the tray grave1 if possible and allow grave 1 to dry fully to kill algae; repeat periodically; or, spray grave 1 with Simazine 80W, 1 tpq. A70-535 0
ALGAE: Control on Surface of Potting Medium Use 1.5 ttpg. of Maneb (Manzate) as heavy spray. A73-409 0
ALGAE: Controls When it occurs in a humidity tray holding water and pebbles, pour in a little chlorine (household bleach), let it remain for a while then decant and ventilate; or, use neutral copper. A86-929 0
ALGAE: In Osmunda Under Lights Usually caused by heavy organic fertilizers plus high humidity; harmful only if it excludes air from roots; use Physan 20. A79-910 0
ALGAE: In Pots Use of Bioquin satisfactory,address given; Manzate (Maneb) fungicide controls algae; use 1 ounce to 4 gals. water; various basic copper fungicides also control algae. A73-888; no safe algecide known. A77-1101 0
ALGAE: In Rainbarrel To destroy it add some sodium hypochlorite, then aerate to free the chlorine; exclude light by covering barrel with black polyethylene. A67-579 0
ALGAE: Interior of Greenhouse Wash off with soap and water, spray every few weeks with household bleach which does not harm plant materials but can harm the skin, so wash it off, if necessary. OR82-102 0
ALGAE: In White or Clear Pots In areas of strong light algae grows inside plastic pots which are translucent; dark pots exclude light. A72-490 0
ALGAE: Its Effect on Plants Algae can be harmful to plants grown in clay or crockery pots by covering the roots, so wash it off the pots and water less. A81-688 0
ALGAE: On Potting Medium Surface Medium is 1 sand, 1 fir bark, 1 milled sphagnum; water well, then let the surface dry; syringe only in early morning. A77-527 0
ALGAE: On Stones in Tray Under Plants Humidity trays should be flushed with Clorox 20% solution and allowed to stand 15 minutes, then flushed again with water; replace the plants. A82-588 0
ALGAE: To Prevent Growth in Tanks Drain the tank; add Clorox 1 ttpg. and let stand one and a half hours; drain, replace with clear water. A65-53 0
ALGICIDES: Condensation Drip From Air Cap Insulation Promotes Algae To render drip harmless spray with Physan 20, 1/2 tpg. A79-124 0

New Topics

  1. JENNIFER CHARMAN asked question SSPECIES OF ORCHID in category General Discussion
  2. Lois Lane asked question Why can't I post on this site? in category General Discussion
  3. Karen Johansen asked question Historic Cattleya in category Cattleya Alliance
  4. William Woodcock asked question Encyclia aspera in category Curiosity
  5. Ron Hellendall asked question Designing a greenhouse for orchid growing in category General Discussion

New Comments

  1. Lois Lane commented on member plant Ctna. Why Not by Alex Maximiano
  2. Carol Holdren commented on topic "SSPECIES OF ORCHID" by JENNIFER CHARMAN
  3. Carol Holdren commented on topic "Why can't I post on this site? " by Lois Lane
  4. Carol Holdren commented on topic "Historic Cattleya" by Karen Johansen
  5. Carol Holdren commented on topic "Encyclia aspera" by William Woodcock
  6. Jim McGuinn commented on topic "Designing a greenhouse for orchid growing" by Ron Hellendall
  7. Mark Bennett commented on member plant Sarcochilus Newbold Alta 'SBC092' by Mark Bennett
  8. Mark Bennett commented on member plant Sarcochilus Newbold High Noon 'SB140' by Mark Bennett
  9. Carol Holdren commented on orchid Epi. Moonlight Firefies
  10. Jeanne Uzar Hudson commented on topic "Paph Support" by Nicholas Levendosky
  11. Rosemary Chenery commented on topic "Lost tag - can anyone provide a name" by Rosemary Chenery
  12. Taylor Savage commented on topic "Myrmecatavola Frances Fox" by Elizabeth Wagner
  13. Vanessa Castleberry commented on member plant Phal. Corning-Cervi by Vanessa Castleberry
  14. Arne Schon commented on orchid B. perrinii
  15. Tina Bond commented on member plant Phal. pulchra by Vickie Seibert
  16. Tina Bond commented on member plant Bc. Memoria Nancy Ginoccho by William Gorski
  17. Tina Bond commented on member plant Rlc. Hsinying Williette by Mary Lane
  18. Carol Holdren commented on topic "Articles posted" by Stephen Dorsey
  19. Mary Lane commented on member plant Phal. I-Hsin Rose Milkshake by s mcn
  20. Shawn Dvorak commented on member plant Bulb. mucronatum by Shawn Dvorak