Category: Orchid Doctor

BOTRYTIS: Time Lag to Its Visibility

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago It takes normally 10 to 12 hours to show on cattleya flowers. A80-110 Read More

PHALAENOPSIS: Buds Fall Off in the Home

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago The chances are good that the atmosphere in the home in winter is too dry because of low relative humidity, so place the plants on pans of gravel ana water. A83-1156 Read More

ORCHID GROWERS: Ten Commandments for Them

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago 1.Learn basic culture. 2.Provide proper facilities. 3.Watch for creeping obsolescence. 4.Learn about diseases and pests . 5.Buy good stock . 6.Learn the names and watch the labeling. 7.Be aware of ... Read More

FLUORESCENT LIGHTS: To Produce Excellent Color in Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago For display, the odd combination of one standard (not wide-spectrum) Gro-Lux tube #F40/GRO, with one Cool White Deluxe tube #F40/CWX (not the standard Cool White tube); under them white is pure whi... Read More

PETAL BLIGHT: Botrytis cinerea

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago It is confined to older flowers during cold damp weather; it is most common on various genera; small, circular spots often bordered by a delicate rim of pink; the imperfect stage Botrytis cinerea i... Read More

SOLAR RADIATION: U.S. Cities Table

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago Three-year average solar radiation square feet of horizontal surface for peak summer months; about 70 cities listed; highest radiation is in Phoenix with 200; lowest is Caribou, ME. at 115. (RMH) Read More

LAMINAR FLOW CABINET: A Work Area Free From Air-borne Spores

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago Provides steady stream of sterile air, preventing contamination in flasking procedures. A72-1094; for a report of experiments after 15 months with Laminar-flow set refer to OR77-203+ Read More

CYMBIDIUMS: Fertilizer for Blooms

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago Mix your own 2-10-10: 3.6 lbs. of Ammonium phosphate (16-20-0); 1 lb. Urea (45-0-0); 5.6 lbs. Phosphoric acid (0-75-0); 10 lbs. Potassium sulphate (0-0-50); 30 lbs. water; makes 4.5 gals, concentra... Read More

WORMS: Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago The best substrate for Cattleya labiata; it is a fern trunk fiber Dicksonia sellowiana, native to Brazil's Atlantic forest; now endangered. OD87-147 Read More

KEIKIS: On Phalaenopsis lueddemanniana

Author is Robert M. [Bert] Hamilton (Compiler), posted about 4 years ago Culture is the key; possibly too little light, or too much water or potting medium too dense; over-fertilizing also causes keikis to appear. A77-449 Fertilizer at the rate of 50 ppm. could cause... Read More