The Orchid Doctor Articles under the Heading Anthracnose

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, EUROPEAN: Gloeosporium Affine A weak parasite; lesions on leaves and pseudobulbs slightly sunken, yellow to light green, circular; later, spore-bearing structures appear. A66-480; AH29Spots 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 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. Pam Alexander asked question How to repot a Mattie Shave in category General Discussion
  2. Rae Walker asked question Name help in category General Discussion
  3. John Small asked question Schomburgkia, species or hybrid in category General Discussion
  4. Robert H. Findlay asked question Help with ID of this Eria sp. in category General Discussion
  5. Osura Mindula Gunasena asked question Help to Identify the Id of this Vanda in category General Discussion

New Comments

  1. Carol Holdren commented on topic "How to repot a Mattie Shave" by Pam Alexander
  2. Frank Cambas commented on member plant Zns. Cynosure var. Blue birds by Ben MG
  3. Robert H. Findlay commented on topic "Lady Bug or dangerous bug" by John Small
  4. Robert H. Findlay commented on topic "Help with ID of this Eria sp." by Robert H. Findlay
  5. Carol Holdren commented on topic "Name help" by Rae Walker
  6. Carol Holdren commented on member plant Dtps. Younghome Little Spirit by Heather A
  7. Sara D commented on member plant Den. Green Mist by Sara D
  8. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
  9. Sara D commented on member plant Pot. Marie Yellow Bird var. Love Love by Sara D
  10. Carol Holdren commented on topic "Help to Identify the Id of this Vanda" by Osura Mindula Gunasena