Category: Orchid Doctor

TERRESTRIALS: Native Australian Types

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Their kinds and culture, a rich field; refer to OR85-304; 323; 359 Read More

TERRESTRIALS: Native Canadian Types

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Another rich field of 68 species with comments on their distribution and pollination biology; refer to Wll-121 Read More

TERRESTRIALS: Native U.s. Types

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Ensuring seed fertility = refrigeration is the key to success for Cypripedium reginae and likely others; refer to A87-935Formula for seed germination = developing embryos in flask sometimes turn bl... Read More

TERRESTRIALS: Problem Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use plastic pots, broad based, but half as high as most; repot any time during dormancy and carry over about one-third of the old compost to transfer the mycorrhiza; dormancy comes after flowering ... Read More

TERSAN: Toxicity Reactions in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Irritates the skin, eyes, stomach ulcers; injures the liver and kidney; depresses the brain; violent reactions in association with liquor. A68-583; ridiculous, the LD-50 is 500. OWD Read More

TETRACHLOR (CARBON TETRACHLORIDE): Toxicity Reactions in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Nervous depression, liver and kidney damage. A68-583 Read More

TETRAPLOIDS: Chance, in Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A prolific source of these has been through the mass tissue culture process of recent years which has produced many sports. A78-1022; thousands of them are a complete failure as parents. AU79-139 Read More

TETRAPLOIDS: Converted, in Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In 1966 Donald Wimber presented a paper on the conversion of diploids into tetraploids by use of colchicine; many plants are now available. A78-1022; refer to AU80-109+They never revert to the dipl... Read More

TETRAPLOIDS: Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A comparison with diploids: the tetraploid flower is bigger, the petals and sepals wider, so is the column; the shape is improved; the tissue of all parts is thicker and color is thereby intensifie... Read More

TETRAPLOIDS: In Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago "4n's" have advantages and disadvantages for the orchid world; the colchicine-converted ones have caused a lot of confusion in the orchid world; refer to OR81-169They are the heaviest producers of ... Read More