Orchid doctor

ANTHRACNOSE, EUROPEAN: Gloeosporium Affine

Orchid Doctor

by Robert M. Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 3 years ago.

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A weak parasite; lesions on leaves and pseudobulbs slightly sunken, yellow to light green, circular; later, spore-bearing structures appear. A66-480; AH29

Spots on leaves yellowish or light green, then light brown, dotted with spore-bearing structures of concentric rings; with humidy, rose-colored spores ooze out; cut off and burn; spray with benomyl at 1 ttpg.; repeat in a week; or with ferbam, captan or zineb; dip for five seconds in Natriphene 1:2,000; avoid overhead watering. B12,; BU14

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Anthracnose Comments
ANTHRACNOSE, AMERICAN: Glomerella Cincta Most common on leaves; weakened plants are most susceptible; brown discoloration round in shape, possibly sunken; cut off parts, spray with benomyl, 1 ttpg; repeat in a week; or, spray with zineb, captan or ferbam; avoid sun-scald; avoid high nitrogen; to prevent on new flowers spray with 1:2,000 Natriphene + drop of detergent. B11, BU13 0
ANTHRACNOSE, AMERICAN: Glomerella Sp. + Colletotrichum Sp. The latter stages attack above-ground; brown discoloration, round or irregular, more or less sunken, rather sharply defined; spore pustules show in dead areas on leaf or flower. AH29 0
ANTHRACNOSE: Leaf Spot Leaves develop circular or oval sunken spots, which are reddish changing to dark brown or grey; for controls use Captan or Benomyl at 1 ttpg. AU85(4)-31Many genera are affected by Gloeosporium and Colletotrichum in warm temperatures with excessive moisture and poor light; leaves develop circular or oval sunken spots; reddish brown, change to dark brown or gray; fruiting bodies form; treat spots with copper Bordeaux mixture, Tersan, Zineb; refer to N317+; use Captan, Ferbam, Zineb. S202; use benomyl at 1 ttpg. 0

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  1. Kevin Fernandez asked question Yellow leaves in category General Discussion
  2. Karen Kaye asked question details for care. Food, fan location etc in category General Discussion
  3. 2016 11 03 Jeanne M Uzar asked question Looking for Plant Identification in category General Discussion
  4. John Small asked question One And The Same? in category General Discussion
  5. Ashley Matherne asked question orchid search in category Cattleya Alliance

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  1. Kevin Fernandez commented on topic "Yellow leaves" by Kevin Fernandez
  2. 2016 11 03 Jeanne M Uzar commented on topic "Looking for Plant Identification" by Jeanne M Uzar
  3. Image Carol Holdren commented on topic "details for care. Food, fan location etc" by Karen Kaye
  4. Edward Zapata commented on topic "Help with ID, Please & Than You! " by Elizabeth Padilla
  5. 2016 11 03 Jeanne M Uzar commented on member plant Bulb. Crownpoint by Jeanne M Uzar
  6. Image Carol Holdren commented on topic "One And The Same?" by John Small
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  9. Image Carol Holdren commented on topic "orchid search" by Ashley Matherne
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