Newly Posted Articles

PH OF WATER: Testing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Litmus paper used to determine pH is unsatisfactory because color variations are too subtle to be determined; use a colormetric method where drops of Brom Creosol Purple are added to water to get a... Read More

DISEASED PLANTS: Removal of Affected Parts

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Virused plants are usually affected throughout, destroy the plant; bacteria: remove parts when the first visible symptoms appear; fungi: remove spotted leaves particularly if the spots appear on th... Read More

AMMONIUM NITRATE: As Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use only 1 round teaspoon in 5 gals. of water. A69-130 Read More

MICROCLIMATES: Variability of Temperatures in a Small Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use several thermometers in addition to a high-low type to check degrees; it is warmest at the top, cooler under bench; (generally); variations occur according to the distance from the heat vents i... Read More

POTS, STYROFOAM: Advantages

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Light weight; retain moisture in the mix; algal and fungal growth are lessened; they are porous; several genera have been grown successfully in them. A68-232; OWD Read More

CATTLEYA MOSAIC VIRUS: Transmission by Insects

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is the only virus which is definitely known to be transmitted by .aphids. OD68-150 Read More

PHALAENOPSIS: Flower Stem Crooked and Discolored

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is a sure sign of virus; destroy plant immediately. F77-16 Read More

POTTING MEDIA: For Hot Areas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In hot countries fir bark deteriorates too fast, as also does sphagnum moss, so tree fern is the major choice, mixed three parts to one part of chipped redwood bark. F87-182 Read More

POTTING MEDIA: For Excellent Growth Also

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Both terrestrials and epiphytes produce more growths, leaves and flowers in a mix of 50/50 sphagnum peat and perlite than in tree fern mixes, or bark. Hort. revs. 1983-288 Read More

COCKROACHES: In Orchid Houses

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In Australia a cockroach likely from Central America lives among and on epiphytic roots (Imblattella orchidae) AU87-Spring-14 Read More