Newly Posted Articles

BLACK ROT: In New Leads of Potinara; Benlate and Natriphene Did Not Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 1/2 tpg. drench of either Dexon-35, Truban, Terrazole or Banrot; commercial greenhouses may sell a few spoonfuls of one of them. A75-500 Read More

BLACK ROT: Caused by Fungi Pythium ultimum and Phytophora cactorum

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Most destructive to cattleya-types; worst during cool months; purplish brown area on leaf or root and rhizome and upward into pseudobulbs; drench with Truban 1/2 tpg. AH16 Read More

CYMBIDIUMS: Spikes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Train them during warmer part of the day; during cold they are brittle and break easily. OA78-170; Use bamboo stakes with twist-ems or string suspended from the roof,or Nie-Co-Rol tension type with... Read More

GREENHOUSES: Pressure-treated Lumber for Construction

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Avoid wood treated with creosote, pentachlorophenol or copper compounds; the non-toxic ones are fluorochrome, arsenate phenol, and chromated zinc chloride. A86-147 Read More

CROWDING PLANTS: Do Not Do it

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Air circulation is very important in the growth process. OD72-227 Read More

FIBERGLASS: Clear Panels on West Side and Green-blue on East

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use only clear throughout, or nearly clear white; the green-blue will heat the greenhouse too much in summer and add to coolness in winter; it will also filter out too much of the red light. A72-55 Read More

HYPONEX: Required Percentage of Flowers Open

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Had one flower or more missing, crippled or damaged; plant was too small, or in bad condition; other reasons. FR123 Read More

TREES, HOST: In Florida

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For cultivated orchids some trees may be better than slabs for small plants; a list of wild trees with appropriate species for them; refer to A79-792+Live oak, mango, frangipani, calabash and citru... Read More

COLORS IN FLOWERING: Judging of Hues

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The American Orchid Society and the American Horticulture Council adopted the Nickerson Color Fan (Maxima Chroma -- 40 Hues) for color descriptions in awards, etc. A58-108 Read More

BRACTS ON SPIKES: But Flower Buds Don't Show There

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Both oncidiums and phalaenopsis require a cool treatment of several weeks to promote flowering. A80-960 Read More