Newly Posted Articles

BLACK SHEATHS: Fungus Disease

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Occurs especially under humid conditions and when water stands at base of the sheaths; cut off sheath above buds and spray with Tersan, Zineb or Natriphene. N319; cut off just above buds. S203 Read More

FLOWERS: Streaky, Cause Unknown

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It may be caused by an insecticide but not likely; Diazinon 50WP not likely the cause; but individual plants show surprising toxicity reactions; low humidity not a factor; possibly virus. A79-674 Read More

FLOWERS: Whitish "etching" Damage on Petals

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It ruins blooms of such as Dend. phalaenopsis and others; can be caused by chemical spray burns, or a calcium residue from hard tap water. A85-192 Read More

FLUORESCENT LIGHTS: Cattleya Types Produce Only Vegetative Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Keep night temperatures to 60-62 deg.F. and days to 78-85 deg.F., with not more than 13 hours light. A69-424 Read More

FLUORESCENT LIGHTS: How Effective Are the Twisted Ones?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Light is produced by the molecule in gas rubbing against each other and the more tube surface, the more light that is visible; twist-types have their surface area increased by 15 to 25%. A83-343 Read More

SHADING, ECLIPTIC: Permanent with No Movable Parts

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The amount of shading changes with the inclination of the sun; for the south end of a greenhouse; like a fixed Venetian blind; slats are set so low that the winter sunlight enters, but the high sum... Read More

SHADING, GREENHOUSE: Aluminum Paint

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Has a high reflective quality and keeps the greenhouse temperature ideal for growing, with excellent results; no report on rate of wear-off or removal in fall. A63-835 Read More

WATERING FREQUENCY: How Often Is Water Required by Cattleyas Growing Outside?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The standard answer is as often as required, depending on the usual factors related to conditions. A79-674 Read More

INSULATION: Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A double layer of film like a flat balloon which can be inflated a few inches and which covers the whole greenhouse provides an excellent insulation layer. A85-1119More than two layers of materials... Read More

SHADING, GREENHOUSE: Green Paint

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago "Rez" sage green paint adhered best to fiberglass; in Missouri, it caused no bud burn; higher light possible under green shading; refer to A61-458 Read More