Newly Posted Articles

GREENHOUSES: Space Limitations Impose Changes

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Get rid of the poor plants in the collection; relocate the inanimate objects; use step benches for more pot space, use vertical space by means of mounted plants, for pot hangers, etc.; use floor sp... Read More

GREENHOUSES: Sunlight and Automatic Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Use Saran roll screening arranged to raise or lower automatically depending on the amount of sunshine acting as a trigger on a thermostat; diagrams given; refer to A71-699+ Read More

MERICLONES: Clonal Aberrations

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago From one piece of tissue, after about 25,000 plantlets have been proliferated the aberration rate becomes unacceptibly high, and almost invariably in the direction of poorer quality. AU79-197 Read More

MERICLONES: Numbers of Explants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Commercial laboratories usually produce only 5000 explants before mericloning the mother plant again, but if the mother plant is known to be stable the production can rise to 20,000. Au81-165; Hort... Read More

CYMBIDIUMS: Species' Flowering Times in the U.s.

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Cym. eburneum, Feb.-May; Cym. erythrostylum, Sept.-Nov.; Cym. finlaysonianum, April-Sept.; Cym. giganteum, Nov.; Cym. grandiflorum, Feb.; Cym. lowianum, April-June; Cym. pumilum, April-June; Cym. s... Read More

FREEZING: Damaged Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Below freezing weather in southern California caused losses of epidendrums and cymbidium spikes; refer to OIE87Jan-2Nurse them along by watering them sparingly, do not fertilize for a while and giv... Read More

PH (GENERAL): Cymbidium Compost

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago How to test for it: obtain a pH testing outfit from a scientific supply house, which includes a solution, color chart, barium sulfate, distilled water and test tubes; it has a possible accuracy rat... Read More

FLUORESCENT LIGHTS: Footcandles At Various Distances

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Illumination reduces quickly on increasing inches distant from lamps; examples: one inch from two lamps gives 1,1OOfc.; at three inches 680fc.; at six inches 420fc.; at nine inches 300fc. US Dept. ... Read More

FOOT-CANDLES READING: With Photographic Light Meter

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Meters can be bought for reading foot-candles; with a Weston photographic meter convert to fc. by measuring light reflected from a piece of white matte paper and multiply the light value by four. A... Read More

FUMIGATION, U.S.D.A.: Counter-acting Effects of Fumigation of Imported Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago An anti-transpirant sprayed on orchids prior to import would be of no value in countering USDA fumigation damage. A79-674 Read More