Newly Posted Articles

COLOR BREAK, SEVERE: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Another disastrous disease caused by "severe color break disease"; color is patchy with ugly areas of pigmentation; it sometimes deforms flowers; plant is also affected -- new leads appear with ros... Read More

ENVIRONMENTS: Natural

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The more unstable they are in nature the less variable are the clones of a species and conversely the wider a species is spread in several environments and the more stable the environments are, the... Read More

HEATERS: Wood-burning Stoves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They are not recommended because they ruin most orchids unless the draft is fully open at all times to discharge fumes into the neighbour's back yard. A81-526 Read More

BUD ARREST: In Cattleya Sheaths

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago No obvious reason except the death of the buds; remove sheaths carefully to see if buds are still green. A75-1007 Read More

HYBRIDIZING: Barriers Within a Genus

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They exist, but the chromosome numbers are important; chances are increased of achieving fine crosses if tetraploids are used, they lessen with triploids or aneuploids. ODA76(4)-25 Read More

LATH ROLLER BLINDS: Making and Installing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The materials required and their assembly, with illustrations; refer to OR76-155 Read More

LAVA ROCK: Also Called Scoria

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Red lava rock can be obtained in the western States from commercial-industrial roofers and from plant nurseries. A83-951 Read More

NECTARS: Cause of Exudate on Sheaths

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It varies from plant to plant; generally considered to be a sign that plants are making vigorous growth. A63-1011; "sooty mold" fungus turns the exudate into black smudges but does no harm; wash it... Read More

BENCHES: Wooden

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Greenhouse wooden shelves can be sterilized with household bleach. OA80-79 Read More

PH (GENERAL): Of Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Experiments show that if a recommended medium is chosen the initial pH should cause no concern. Hort. revs. 1983-195 Read More