Newly Posted Articles

CARBON DIOXIDE: Ethanol and Methanol Alcohol Burning to Heighten Carbon Dioxide Content of Air

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Satisfactory if burned in greenhouse in small amounts; alcohol flame is invisible by day and dangerous. A69-242 Read More

LEAF NECROSIS: Cymbidium Mosaic Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The initial infection is conspicuous; kills some leaves, afterwards milder symptoms show; plant becomes a reservoir of infection; brown sunken pits on underside of leaves; black and chlorotic alter... Read More

FUNGUS DISEASES: Of Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For an overview refer to N315+ Read More

LEAF TIP BURN: Cercospora Sp.

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Several fungi attack specifically cattleyas, vandaceous types, oncidiums, cymbidiums, odontoglossums; spray preferably with benomyl 50WP at 1 ttpg. fortnightly, or use ferbam or zineb; use a wettin... Read More

LEAF BLIGHT: Also Known as Leaf Die-back, Tip Burn

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Caused by fungus invasion; spreads gradually through leaf; cut it out before treating; infected areas show watery before drying; control with Benlate, or Anti-Damp, or Tersan. RMH Read More

CHARCOAL: In Culture Media

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Has a positive effect on the growth of cymbidium plantlets in the flask, also phalaenopsis and paphiopedilums because it seems to improve aeration. A84-258It seems to improve aeration; for other de... Read More

CROWDING PLANTS: Do Not Do it

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Air circulation is very important in the growth process. OD72-227 Read More

BUD ROT: In Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Caused by Erwinia cyprepedii which also commonly attacks base of leaves; watering procedures do not seem to be a factor; strong air movement 24 hours a day controls it partly; drenching plants with... Read More

BUDS: In Sheath on Cattleyas Stopped Growing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Could be cultural or genetic; no suggestions to offer; if buds are alive remove sheath. A75-1007 Read More

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

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Both oncidiums and phalaenopsis require a cool treatment of several weeks to promote flowering. A80-960 Read More