Newly Posted Articles

TEMPERATURE: To Set Buds

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Paphiopedilums and phalaenopsis initiate buds after two or three weeks of night temperature below 14 dC; hardcane dendrobiums require near 18 dC, and softcane dendrobes need about 13 dC; in cymbidi... Read More

PANODRENCH: Toxicity in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Nausea, vomiting, diarrhea, stomach ache, staggering, weakness, delirium; it injures the kidneys and bowels. A68-583; Panodrench now prohibited in most countries. OWD Read More

PANOGEN: Fungicide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Used to control Orchid wilt, collar rot, black rot (Pythium ultimum), Phytophora and seedling damp-off; use at 1/2 teaspoon per Imperial gal.; very dangerous to humans; use respirator and full prot... Read More

PAPHIOPEDILUM MAUDIAE: A Problem Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It grows tall and weedy and does not flower; this may be due to overfertilizing; it needs 1,000 to l,500fc. 10 to 12 hours daily. A76-611 Read More

ORIENTATION OF PLANTS: Problems Caused by Shifting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Vandas and sunburn, why did those carelessly shifted in the sun, burn while those carefully moved in the same position to the sun not burn?; shifting a plant in the process of showing it off can ca... Read More

TEMPERATURE: Warm, Intermediate and Cool

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In greenhouses, plants are divided into Warm (65 dF minimum at night) such as for Phalaenopsis; Intermediate (60 dF) as for cattleyas, and Cool (50 to 55 dF) as for cymbidiums. F81-84 Read More

TERRAMYCIN: Polymixin; Bactericide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is a wide-spectrum tetracycline; provides a powerful control of Pseudomonas cattleyae; as a spray use six tablets of five mg. each in an imperial gal. water every three days. A71-896 Read More

TERRARIUMS: For Orchids Generally

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use a 30-gal. long glass tank; use fluorescent lighting; use sheet moss from decaying birch logs; use a substrate of one inch perlite; build up contours with medium size firbark; use no soil; top o... Read More

THERMOMETERS: Good and Bad

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A mercury thermometer is not the most accurate; a good dial-read type is more accurate; good ones are accurate to the manufacturer's specifications; 17, accurate types will not be off more than 1.2... Read More

OSMUNDA: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is derived from three ferns widely distributed in the U.S. and Canada, provides nutrients needed by the plants; lasts long, aereates well, is costly to buy, hard to work with, is scarce. A86-497 Read More