Newly Posted Articles

LAVA ROCK: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Growth in this is satisfactory providing it is not allowed to get too dry and if it is periodically flushed to get rid of the salt build-up. A80-1141It lasts almost forever, resists rot, is cost-ef... Read More

LEAF TIP DIE-BACK: Disorder of Cattleya Types

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Newly matured leaves show darkening of veins very close to the tip, later developing into dark, sunken spots which spread to cover three-quarters of the leaf tip ; most active in summer; many theor... 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

LEAF-SPOT: Cercospora odontoglossi

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Control by spraying with benomyl (Benlate 50W) at 1 ttpg plus wetting agent, three times at 15 day intervals. AH86-80 Read More

CYMBIDIUMS: Propagation, the Fastest Way

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Make single back bulbs of a plant and grow all the pieces. A64-490 Read More

LEAVES, PLEATED: On An Oncidium Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago If new leads produce short, split, pleated leaves it is possibly because of a salt problem in the pot; change to plastic pots; under-watering is another partial possibility. A80-254 Read More

HEATERS: Wood-burning Stove

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is apt to emit too much ethylene if it is not properly vented; burning wood is one of the worst sources of ethylene; it is now a crime to burn wood for heating purposes in London. A81-1436 Read More

COKE: As Potting Material

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is 88% carbon, inert, with a sponge-like formation; sterile; proven valuable for potting; not available commercially. A61-644+ Read More

ETHYLENE: Preventive of Bud Drop

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Spraying dendrobiums and phalaenopsis in bud with silver nitrate 100 parts to 1 million of water will prevent bud drop, especially in the fall. ODA76(4)-32 Read More

BARK, REDWOOD: Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Shredded bark used as insulation material and sold as Palco Wool was treated with fire-retardant ammonium phosphate which caused remarkable growth of plants. A87-1041 Read More