Newly Posted Articles

ROT: Most Destructive of the Orchid Diseases

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Phytophora cactorum; Pythium ultimum, Pseudomonas cattleyae, Rhizoctonia solani, and Fusarium oxysporum fma. cattleyae; refer to AH15; refer to BU Read More

ROTENONE: Toxicity Reactions in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Local anesthesia, intestinal distress, tremors.etc. A68-583; ridiculous; just don't eat it. OWD Read More

ROTS: On Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago This is usually Black rot; the plants can be saved by scraping all the rot off the pseudobulbs and removing the roots to allow air to inhibit the continued growth of the anaerobic bacteria which is... Read More

MILTONIAS: Light Requirements

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Shade them in the summer; Colombia types like 1,000 to 1,500 fc, and can be grown with paphiopedilums; Brazilian types like about 2,000 to 3,500fc. and can be grown with cattleyas. OD74-101 Read More

CYMBIDIUMS: Culture to Induce Spiking

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago "full-sun" treatment can be successful; give as much sun as possible in the summer including risk of sunburn and with more water and fertilizer, OD68-244The day-night temperature change must be 20 ... Read More

CATTLEYAS, MINIATURE: Pronunciation

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The correct way is KAT-lee-uh, not cattle-LAY-ya; will they ever learn? A86-147 Read More

MILTONIAS: Pleated Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Accordion-like pleating is usually linked with under-watering but why does it happen when there is sufficient watering? Water can usually fail to wet overdry bark, which might require soaking for s... Read More

MILTONIAS: Pleating Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The real cause is more complex than ever explained before, it is caused by stress within- the plant brought on by conditions where both the greenhouse and the plant are too dry at the same time, im... Read More

MILTONIAS: Pleating of Leaves, Accordion Style

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago This is most commonly caused by insufficient watering during the "expansion" stage of the new growths; the cool-growing types do not like to dry out between waterings and if watering is missed for ... Read More

PUMICE: Definition

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A light, spongy stone thrown up by volcanoes. A75-712; RMH Read More