Category: Orchid Doctor

OIL, DORMANT: With Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A favorite is a combination of dormant oil with Malathion, or Isotox (without Orthene). A87-1259 Read More

OLD TIMES: Compared with Today

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The cultural methods of then and now, materials and methods weighted critically by an experienced grower; refer to OR82-268 Read More

ONCIDIUM ALTISSIMUM: Problem Plant: Culture Required

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It responds to cattleya culture; fertilize with 1/2 tpg. of 30-10-10 fortnightly; let the medium get dry between heavy waterings; give them high humidity. A71-535 Read More

ONCIDIUM KRAMERIANUM: No New Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is characteristic of this plant to bloom without interruption, given enough light and good care; to stimulate vegetative growths, cut off the flower spikes. A63-391; OD78-42 Read More

ONCIDIUM RINGSPOT: Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The mature leaves show rounded, slightly sunken yellow areas on both surfaces of the leaf; the spots on one side do not correspond to those below; they age to a necrotic, purplish brown appearance;... Read More

ONCIDIUM VARICOSUM: Problem Plant; Cultural Requirements

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Any good potting medium, in a shallow pot, with good to strong light suits them; water well when they are growing but less in winter; give no rest; they like cattleya conditions but with more light... Read More

ONCIDIUMS: Breeding Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 18 oncidiums, species and hybrids, rated for a projected attempt at improvement of Oncidium Goldiana (Golden Shower) by eliminating virus; 13 criteria applied, pointing to perfection; refer to OD80... Read More

ONCIDIUMS: Cool Growing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Onc. macranthum and its allies of the Cyrtochilum section, including Onc. superbiens, serratum, falcipetalum, lamelligerum, anthocrene, monachicum, and leopoldianum; they grow cool to cold in Colom... Read More

ONCIDIUMS: Equitant Types

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A cultural hint on how to grow them in Tennessee in a small pot on one lump of charcoal. OIE85-5They will not flower, possibly when they are over-fertilized, so the feed rate should be halved. A83-698 Read More

ONCIDIUMS: Flowering Excessively

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If you can believe it, some have a tendency to flower themselves to death (not in my greenhouse) without showing signs of failure, so cut off the spikes after several weeks. SA85Mar-53 Read More