Category: Orchid Doctor

SOAPS: As Insecticides

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Detergents are as good as soaps; liquid soap is as good as dissolved chips from bar soaps, any popular brand of soap is as good (almost) as a commercial soap insecticide but they must be used with ... Read More

SOAPS: As Pesticides

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When fertilizing, for every 10 tablespoons of dry fertilizer one tablespoon of a biodegradable soap product is added to the proportioner solution and this prevents fungi and algae growth throughout... Read More

SOCIETIES, ORCHID: Their Nature and Successful Management

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For suggestions on their care and fostering with pointers based on much experience, refer to OA76-114+ Read More

SODIUM LAMPS: 1000-watt Size

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are effective for most genera except paphiopedilums, they have a reported life of 25,000+ hours, but can last five years or more; light intensity chart for the lamps placed four feet above pla... Read More

SODIUM: Sensitivity of Plants to It

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cattleya intermedia from the Baixada of Brazil and others are exposed to salt in the air and are practically impossible to kill in the greenhouse; others have not developed their sodium pumps and n... Read More

SOFT ROT (ERWINIA CAROTOVORA): Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is infrequent in orchids; shows as wet rot with most offensive odor; cut out diseased parts or destroy the plant or plants and disinfect everything with Clorox or formaldehyde; spray with Physan... Read More

SOFT ROT (ERWINIA CAROTOVORA): Destructive of Cattleya Types

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The bacterium enters through wounds; causes rapid wet rot with offensive odor in succulent tissue, more slowly in hard growth; cut off and destroy; spray with Physan 20 at 1.5 tpg; treat benches wi... Read More

SOFT ROT: Erwinia carotovoras

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Many genera are affected; bacteria enter the plant through wounds causing a wet rot with an offensive odor; it spreads rapidly in the leaves and roots, less so in the rhizomes and pseudobulbs; dest... Read More

SOLAR CHIMNEY: A Ventilator for Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It harnesses the heat of the sun for a chimney 2 feet square rising 12 feet above the greenhouse roof, painted black on the inside except for the south exposure which is glazed, with a trap at the ... Read More

SOLAR ENERGY: To Heat Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 16ft. by 36ft. greenhouse in San Diego, Cal., kept at 10 deg.F. differential when the lowest temperature outside was 29 deg. F. in an intermediate house, well insulated with two layers of polyethyl... Read More