Newly Posted Articles

SHADING, GREENHOUSE: Light Transmission Recommended

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For New Jersy, for general purposes 30 to 35% light transmission is recommended; that is 60 to 75% shade. A74-708 Read More

BLACK TWIG BORER: Found in Hawaii in 1966

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Bores holes and galleries in orchid tissue; use malathion 2 tpg. as spray; or, use Sevin 1.5 ttpg. P69(l)13 Read More

BLACK-BALL: Type of Excrement

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Frequently found on plants is merely the sticky seed of Oxalis; looks like sticky poppy seed; control with DuPont Karmex DW (Diuron), spraying floors and elsewhere, except dicot plants. A80-850 Read More

BLEACH: As Virus Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A one-minute soak in two to four percent bleach (Clorox, 5.25 percent sodium hypochlorite) solution kills Cymbidium mosaic virus; a four percent bleach is prepared by adding three tablespoons of Cl... Read More

FUNGUS GNATS: A Nuisance or a Problem

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Control them with proper sanitation, avoidance of over-watering; spray them with diazinon or give them a drench Resmethrin 1% aerosol controls the adults. AH86-59 Read More

FLUORESCENT LIGHTS: Details

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The life expectancy on a one-only start of a lamp is 18,000 to 20,000 hours; with a daily on/off routine the expectancy is 12,000 hours in three years; the initial brightness diminishes rapidly for... Read More

FLUORESCENT LIGHTS: For Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Two 48" Wide Spectrum, with two 48" cool-white tubes and with four 25-watt incandescents in one reflector gives 1,000 fc. five inches from the tubes; with 13 to 15 hours per day as adequate for pap... Read More

FLUORESCENT LIGHTS: Generate Too Much Heat

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Rewire the ballasts outside the closet; or, any fan in use must not only circulate air but ventilate to an outside source of cool air. A72-1003 Read More

FLUORESCENT LIGHTS: Growing Under

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Three set-ups are described: Four daylight tubes with two 60W incandescents as a group. 2, Chroma 50's which simulate a summer sunshine-for colour and costs about the same as for daylight tubes, an... Read More

FLUORESCENT LIGHTS: Selection

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A guide to much data on spectral distribution; alternate arrangements of lamp combinations; comparison of 40-watt whites; comparison of five horticultural lamps with cool-whites; comparison of 50 l... Read More