Newly Posted Articles

MOUNTS: Advantages

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago After much experimentation cork bark was preferred for a large collection in California for the following: small cattleyas, dendrobiums, oncidiums, coelogynes and barkerias; much cultural advice th... Read More

CHARCOAL CHIPS: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In Hawaii, all vandaceous orchids grown in straight charcoal chips; fewer problems encountered from bacterial and fungal pests, A76-227 Read More

CHICKEN MANURE: Utility

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In Australia some growers use it composted to the exclusion of all other fertilizers. OA83-147 Read More

CITRIC ACID: Plus Nutrient for Watering

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Accurate proportioning of both is essential; determine pH of water supply, if above 6.0 adjustment is optional; achieve about pH of 5.0 to 5.4, plus approximately 146 ppm. of nitrogen for mature pl... Read More

CITRIC ACID: Used to Lower Ph of Water

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is a good chelating substance and could be responsible for excellent growth of some orchids; also metabolite of living aerobic systems; most plants manufacture their own. F68-114 Read More

POTS (GENERAL): Clay Vs. Plastic

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Comparative experiments under scientific conditions demonstrated that cattleya-type orchids grow almost as well in plastic as in clay; differences in growth due to aeration by clay. A61-32+; OWD. c... Read More

PESTICIDES: Rules for Application

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Identify the right insect or disease; use the recommended insecticide; use it at the right amount, in the right way and at the right time. AH86-64 Read More

GREENHOUSES: Plans to Build

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A publication is usually available from your government college of agriculture which recommends plans. A72-412 Read More

NAMES: Common Names

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For a list of about 130 species with both Latin and common names; refer to Ca82(6)-41 Read More

BACTERIAL DISEASES: Full Listing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For data on causes, hosts, symptoms, controls, etc., of every one ever reported as attacking orchids, refer to OBIV-292 Read More