Newly Posted Articles

GREENHOUSES: Sunlight and Automatic Control

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

AIR MOVEMENT: Excessive

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Too much air turbulence for the frequency of watering indoors can cause retardation of plant growth, so don't overdo it. A86-363;382 Read More