Newly Posted Articles

HEATERS: Wood-burning Stoves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They are not recommended because they ruin most orchids unless the draft is fully open at all times to discharge fumes into the neighbour's back yard. A81-526 Read More

LEAVES: Damage

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Leaf damage can be caused., by two things,a. disease or fungus or, b. insect infestation; remains of insects are never found because they leave after doing the damage; Yellow streaks followed by si... Read More

LEAVES: Fungus Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Spotted and pitted leaves require treatment with a paste made of captan or other fungicide; coat the whole infected area and let the paste dry; wash the bench with captan in water and spray all the... Read More

CYMBIDIUMS: Blisters on Backs of Sepals and Petals, Cause

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Red spiders cause them, if they are without discoloration; aphids cause discolored spots and necrotic lesions. A64-693 Read More

PH (GENERAL): Of Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Experiments show that if a recommended medium is chosen the initial pH should cause no concern. Hort. revs. 1983-195 Read More

LEAVES: Hard Water Deposits

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is difficult to remove them, the best bet is to scrub the deposits with lemon juice or a very mild acid solution, and rinse it off after. A82-1259 Read More

LEAVES: Mesophyll Cell Collapse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago This happens especially in phalaenopsis and is caused by cold water dripping off the roof or from the hose onto the leaves; the scars become visible about six weeks after. F81-14 Read More

LEAVES: New Ones Do Not Open

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They remain partly closed; try periodic syringing in the morning; there is no definite remedy. A78-226 Read More

HEATERS: Wood-burning Stove

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is apt to emit too much ethylene if it is not properly vented; burning wood is one of the worst sources of ethylene; it is now a crime to burn wood for heating purposes in London. A81-1436 Read More

BARK, REDWOOD: Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Shredded bark used as insulation material and sold as Palco Wool was treated with fire-retardant ammonium phosphate which caused remarkable growth of plants. A87-1041 Read More