Newly Posted Articles

FLUORESCENT LIGHTS: Selection

Author is Robert M. [Bert] Hamilton (Compiler), posted over 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

STOMATA GUARD CELLS: As Guides to Ploidy in Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Cell measurement is only an indication of change of ploidy and is not conclusive. OA79-6 Read More

SHEATHS: Bud

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago On cattleya browning and dying off of sheaths is not likely to be caused by ethylene which would require a high concentration to cause it; most common cause in not known; to save the flowers remove... Read More

SHADING, GREENHOUSE: Light and Temperature Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Data on the best amounts of light; tolerance of plants to light; relation of light to temperature; solar radiation; role of reflection; methods of shading; formulae for sprays; refer to A64-207+ Read More

PERLITE: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Screen out the fines through a window-screen mesh; place some drainage in the bottom of the pot; position the plant then pour in the Perlite to within an inch of the pot top then cover with half an... Read More

BLEACH: Sodium Hypochlorite

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago A solution containing from 4.25 to 6% of it is sold under many names worldwide for household use; in greenhouses is is a convenient product for sterilizing pots, labels, tools, she Ives etc. 0BII-2... Read More

BUTTERMILK: As Bait for Snails and Slugs

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Success reported with use of one ounce of buttermilk plus six drops of Slugit placed in shallow container placed on floor. A73-641 Read More

CACTUS: As Host Support for Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago On large Saguaro-type cactus in west Mexico have been found Encyclia adenocarpa and Barkeria lindeyana. OD76-175 Read More

BLETILLA HYACINTHINA: Culture

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago A terrestrial, requires same culture as phaius; can be grown outside in the south U.S.; needs half-shaded moist area; in greenhouse give broken sunlight, lots of water, good drainage, and a medium ... Read More

BLACK SHEATHS: Caused by Fungi Under Excessively Damp Conditions

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Prevent spread to buds within by cutting off tops of sheaths to let in air; spray with Physan or Tersan. A73-815 Read More