Category: Ailments

COLOR BREAK: Virus Induced in Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Cymbidium mosaic virus does not cause color-breaking; tobacco mosaic virus orchid strain induces it; illus. of infected flowers; diagrammatic plant with locations of virus. A70-395; BU57; OD71-199;... Read More

VIRUS: Control by Chemicals

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The use of household bleach is recommended in concentrations varying from 20% upward to full strength, timed from 30 seconds to 10 minutes; refer to A82-725 Read More

INSECT REPELLANTS: Use on Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Not recommended as they cause damage to buds: Off, when sprayed on flowers of paphiopedilums, dendrobiums, pleione caused collapse of flowers within an hour. RMH Read More

INSECTICIDES: Products Registered for Use on Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A list with those pests attacked, with dosage recommended; refer to AH86-62 Read More

LEAVES: On Paphiopedilums Bend in the Middle and Slump Over

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Turgidity is lost when medium is too dry or the humidity is too low; dark weather may cause it. A75-298; OD73-158 Read More

SHEATHS: Growth Is Poor and After Starting They Turn Dry or Brown

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The cause is not fully known; may be caused by air pollution or poor health, or not enough light; remove the sheaths, the buds will usually bloom. A76-795 Read More

INSECTICIDES: Organic Dusts for Thrips

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Rotenone, Pyrethrums, Ryania, etc., are not as good as Malathion, plus a sticker-spreader. A80-1141 Read More

INSECTICIDES: Prophylactic Spraying

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Overuse of deterrent sprays is not recommended because it encourages development of resistant strains of pests; it is best to treat each problem as it arises. A85-866 Read More

INSECTICIDES, SYSTEMIC: For Red Spider

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use Murphy Systemic System Insecticide twice at a ten-day interval followed three weeks later by two further sprays of PBISystemic Insecticide, then monthly thereafter alternating the two; effectiv... Read More

PESTICIDES: Shelf Life

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They should be purchased for short-term use; mark the date of purchase on the container; most keep their effectiveness for two or more years if stpred properly; signs of ineffectiveness in dusts an... Read More