Newly Posted Articles

HYDROCULTURE: Pros and Cons

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Orchids grown in gravel-filled benches which are periodically flooded produce excellent plants but the roots travel and intertwine inextricably; individual containers should be used, such as plasti... Read More

HYDROPONICS: Applied to Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use man-made clay stones, a 2-2-2 nutrient solution; two styles of hydro-pots are available in sizes from four to nine inches; paphiopedilums, dendrobiums, odontoglossums and others grow successful... Read More

HYDROPONICS: In Orchid Culture

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The system is not new; it makes use of such media as scoria, volcanic cinders, pumice, rock wool, manufactured resins (such as Oasis) and other media; they need no replacement and can be re-used af... Read More

HYDROPONICS: Trials

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A Laelia pumila was repotted into round pebbles and placed in a hydroponic set-up where it showed astonishing improvement; a complete unit was set up with two fertilizer solutions, one for spring t... Read More

HYDROPONICS: Use of Glass Netting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A description of a new method whereby fibres with capillary spaces raise the water with nutrients from the tray to the plant roots in a continuous, constant and sufficient method; a patented system... Read More

HYGROMETERS: Wet and Dry Bulb

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago One deg. F. depression on the wet bulb equals 5% drop in humidity from 100%; if the wet bulb reads 62 deg. F. then the relative humidity is 100 less 15 or 85%; keep the water supply in the bulb ade... Read More

INSECTICIDES: Recommended

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Aramite, Cygon 2E, Malathion, Plant Fume. OD67-50 Read More

INSECTICIDES: Rubbing Alcohol

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Recommended for use on mealybugs, soft scale and possibly others, do the top and bottom of leaves as a spray; it quickly dessicates the pests. OIE86Sept-15 Read More

INSECTICIDES: Toxicity

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Expressed in LD-50 (Lethal Dose for 50% of animals on which it was tested) plus a dose number, the lower it is the more lethal; examples: Chlordane 475 to 590; chlorobenzilate 3,100; Cygon 2E 215 t... Read More

SPRINGTAILS: Collembola

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Small insects about 5mm. in length; they appear thickly on damp potting media; white or grey in color; they feed on decaying matter, bacteria; more a nuisance than anything else; no control given; ... Read More