Category: Ailments

ROT: Best Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For paphiopedilums, the basic prevention or remedy is air movement; the fan should be blowing directly on the plants to keep things stirred up. OD70-134 Read More

ROT: Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago By use of preventive surgery: when water and debris collect in newly opened leaves (outside in Florida) and a combination of high temperature and heavy rainfall lead to rot starting, preventive dra... Read More

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: 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

MILTONIAS: Rootless Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Place them in an air-tight plastic bag with some moist sphagnum, inflate it by mouth for the carbon dioxide administered, seal it tightly; repeat fortnightly, re-moistening as necessary; when roots... Read More

PESTICIDES: Shelf Life

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They should be purchased for short-term use; mark the date of purchase on the container; most keep their effectiveness for two or more years if stpred properly; signs of ineffectiveness in dusts an... Read More