Category: Orchid Doctor

VARIETY: Use of the Term

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The name of a varietal form is placed after that of the species or hybrid; a botanical variety is preceded by the word variety or its abbreviation var.; example: Dendrobium fimbriatum var. occulatu... Read More

VELAMEN: Root Covering Cells

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For detailed information refer to A61-966; OR75-139+ Read More

VENTILATION: Exhausting Hot Air From the Greenhouse Peak

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Install a turbine generator as high as possible with a small fan under it blowing straight up; refer to A83-52 Read More

VENTILATION: Rate of Exchange

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago On hot days the greenhouse needs one change of air per minute by exhaust fans. A78-606 Read More

VENTILATION: Size of the Vents

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They should be at least 10% of the roof area as a minimum. RMH Read More

VENTILATION: With Solar Energy

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A solar chimney draws air vertically out of the greenhouse without machinery; build a flue out of three/eighths inch exterior plywood; for diagram, materials, method of operation; refer to OD88-30 Read More

VENTILATORS: Non Electric

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Self-automated ventilator units are moved by a heat-expandible mechanism, they need no electricity and are useful in case of electricity failure; some growers use them only. Ca85(l)-10 Read More

VERILUX TRU-BLOOM: Fluorescent Light for Growing Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Have been used with excellent results. A77-897 Read More

VINEGAR: To Correct the Ph of Water

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is not recommended because acetates can be toxic to plants. A78-13 Read More

VIRAL DISEASES: Full Listing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For data on distribution, causes, hosts, symptoms, control, comments on every name reported, listed under common names; refer to OBIV-296; for fifty pages in non-handbook presentation refer to A.0.... Read More