Category: Orchid Doctor

ANTHRACNOSE, AMERICAN: Glomerella Sp. + Colletotrichum Sp.

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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 Read More

ANTHRACNOSE, EUROPEAN: Gloeosporium Affine

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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, t... Read More

ANTHRACNOSE: Leaf Spot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 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 ... Read More

ANTIBIOTICS: As Growth Stimulants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Streptomycin, terramycin used experimentally on cattleyas resulted in disadvantages, and are not recommended; refer to A59-38+ Read More

ANTI-DAMP: A Fungicide and Bactericide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use as spray, drench or soak for several hours; concentration 1:2000; for community pots and mature plants; has LD50 of 1200. A73-810; N110,117 Read More

ANTI-TRANSPIRANTS: For Saving Divisions of Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If they have no roots, apply a dessicant such as Wilt-Pruf, Vapor Guard, NuFilm 17, Folicote, Cloud Cover, all water-soluble, biodegradable polyethylenes which when applied to pseudobulbs, etc., pr... Read More

ANTI-TRANSPIRANTS: Use After Repotting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Apply Wilt-Pruf, Folicote or similar product to prevent loss of moisture from plants, avoid getting any on the roots, be sure to coat undersides of leaves also; apply with small brush or spray. OIE... Read More

ANT-PLANTS: Ants in Schomburgkia Pseudobulbs

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Five species known as the Myrmecophila (ant-loving) have natural openings at the heavy base of the pseudobulbs for ants to enter. A63-17; for full treatment, refer to F78-154+ (from Orquideologia, ... Read More

ANT-PLANTS: Ants in Schomburgkias (myrmecophilas)

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In cultivation the basal hole still forms; speculation that ants do the hollowing out of the pseudobulbs and/or the base hole has not been confirmed. AU79-211 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More