Newly Posted Articles

PHALAENOPSIS: Spots on Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Clear, translucent pale yellow spots are poss- ibly bacterial disease; spray with Physan 20. A78-998; spray with Tersan 75 at 1/4 teaspoon to 75 quarts of water. A69-902 Read More

PHALAENOPSIS: Growth Affected by Flowering

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Plants grow faster if the flower spikes are removed to divert development. A75-803Plants grow faster if the spikes are removed to divert development. A85-1435 Read More

PESTICIDES: Injury to Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Use them with great caution; observe precautions regarding temperatures at which to apply, frequency of application and rates and compatibility; they can cause leaf-scorch, necrotic spotting, abnor... Read More

PESTICIDES: Kocide and Zyban

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago New names, they should first be checked to see if they have been cleared for orchids at your local Agriculture Department level; recommendations are the same rates for both Kocide 101 and Zyban 15%... Read More

PESTICIDES: Lethal Dose

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago The "LD50" means the amount of the chemical that will obtain a 50% kill of warm-blooded animals with a single dose; the dose is given in milligrams of chemical per kilogram of body weight. A71-893 Read More

PESTICIDES: Pots Brought Into Growing Area

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Pots brought into a roofed slathouse should be treated with granules such as metaldehyde and mesurol; spread them over and around the pots. A78-403 Read More

POLLEN: Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Viability expected: it can vary from one species to another ; some will keep months in a dessicator at 40 to 50 deg.F.; most breeders prefer not to store it. A75-680 Read More

WOOD PRESERVATIVES: Greenhouse Use

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago The only dependably safe one is copper napthanate; zinc napthanate is a lesser possibility. A76-795 Read More

FERTILIZERS: Liquid, for Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Rutgers University1s formulation applied one, three or four weeks according to season: per 100 gallons water add 12 oz. of 20-10-10 plus six ounces of 20-20-20, plus four ounces of ammonium nitrate... Read More

NOMENCLATURE: The Authorities for Correct Forms

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago There are two: The international code of botanical nomenclature, and The international code of nomenclature of cultivated plants; for orchids, it is the Handbook on orchid nomenclature and registra... Read More