The Orchid Doctor Articles under the Heading Brown Rot

Brown Rot Comments
BROWN ROT: Erwinia cypripedii Attacks paphiopedilums; bacterial brown rot starts as small roundish water-soaked yellow spots often in the middle of the leaf; changes to dark chestnut; may appear greasy; reaches growing point of plant and changes it to dark shrivelled mass; isolate plants; disinfect bench with Clorox 10%; destroy all leaves; spray with Physan 20, 1.5 tpg. or drench in Natriphene 1:2,000 tpg.). B40; BU49 0
BROWN ROT: In Paphiopedilums Caused by the bacillus Erwinia cypripedii; starts as small chestnut brown spot on leaf; spreads to crown then to other leaves; spreads rapidly; plant can be saved by excision; soak for hours in Natriphene or Anti-Damp; repeat after a few days, two or three treatments. N320Drench with Banrot, 1 ttpg. A66-406; A75-980 (illus.); A77-449Small round to oval water-soaked spots, in middle of leaf; not common; spray with Physan 20, 1/2 ttpg. AH22 0

New Topics

  1. Mary Lane asked question Orchid roots .com site? in category General Discussion
  2. David George asked question recently purchased orchid shows unstoppable roots in category General Discussion
  3. katherine mott asked question shorter stem with less vigorous blooms in category Phalaenopsis
  4. Glenda Ratliff started topic need info on yellow bird in category General Discussion
  5. Paula Milano asked question Looking to join an orchid club. in category General Discussion

New Comments

  1. Melvin Waki commented on topic "Orchid roots .com site?" by Mary Lane
  2. Carol Holdren commented on topic "recently purchased orchid shows unstoppable roots " by David George
  3. Michael Makio commented on orchid V. Beatrice Makio
  4. Carol Holdren commented on topic "shorter stem with less vigorous blooms" by katherine mott
  5. Carol Holdren commented on topic "need info on yellow bird" by Glenda Ratliff
  6. Carol Holdren commented on topic "Looking to join an orchid club." by Paula Milano
  7. Jeanne Uzar Hudson commented on topic "Repotting Large Cattleyas" by Jeanne Uzar Hudson
  8. Jeanne Uzar Hudson commented on member plant Paph. malipoense by Jeanne Uzar Hudson
  9. William Gorski commented on topic "how difficult is it growing from seed" by kevan gregory
  10. Carol Holdren commented on topic "Information " by Carmen Britton