Newly Posted Articles

BLACK ROT: Phytophora Cactorum

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Leaf and heart rot; cattleyas are the main host; fungus attacks all parts except roots; shows purple, purplish brown or black; leaves often become brittle and can be jarred off; caused by coolness ... Read More

PAPHIOPEDILUMS: Water Needed

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Leaves may be yellowish-green, stunted, and may be flaccid because of too little water. A78-606 Read More

BOTRYTIS CINEREA: A Saprophyte

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Flourishes on decaying leaves, flowers, flower sheaths, leaf axils, organic debris on benches and floors, multiplies under conditions of excessive damp and cold; produces unsightly brown to black s... Read More

BOTRYTIS: Flower Spotting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by Botrytis cinerea; occurs generally on cymbidiums, but also infects cattleyas and phalaenopsis; cool conditions favor infection (45 to 65 deg, F); clean culture is essential; to date no ch... Read More

FLOWERS: Left on Cattleya Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago No detrimental effect is caused if flowers are left on the plant until they wither. A65-52 Read More

ULTRAVIOLET REFLECTANCE PHOTOGRAPHY: Visible Photography Differs From the Ultraviolet

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A reliable technique to determine pattern changes; with a list and percentage changes; possibilities surmised. A81-53 Read More

VANDAS: Movability

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For show purposes; because the roots otherwise spread and cling widely to the bench, etc., when potting place the plant in the pot so that the media comes up only half-way, so that the roots will c... Read More

CORSAGES: Making Them

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A simple method is to use a small pad of moistened cotton for the cut or stem end, a piece of foil and a pin; for illus. refer to A88-266 Read More

CAPILLARY WATERING: Method and Results

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On a sand bed kept wet to within two inches below surface place plants without drainage crocks so that moisture is drawn into the pot by capillary action; test was successful with 100 paphiopedilum... Read More

CARBOHYDRATES: Formation and Respiration

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are the focal point of growing; they determine greenhouse design, potting media, fertilizing levels, flowering, temperatures and humidity requirements and concepts. AU79-35 Read More