Newly Posted Articles

PESTS AND DISEASES: Controls Used in Earlier Days

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For a review of petroleum distillates, cyanide crystals, nicotine painting, Black Leaf 40, DDT, Chlordane, Red Arrow scrubs and dips for such pests as orchid beetie, cattleya fly, boiduval scale, n... Read More

PH (GENERAL): Adjustment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago How to bring it down to normal: do not use a sodium salt; the simplest thing is to use dilute phosphoric acid, at a few drops per gallon of water. A78-698 Read More

PH (GENERAL): Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Alkalinity or acidity of a medium; 7 is neutral; values below 7 indicate acidity,- above 7, they indicate alkalinity; for orchid seed germination a pH of 4.8 to 5.5 is required; adjustments can be ... Read More

FERTILIZERS: To Promote Better Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A wide-spread error is that high-phosphorous fertilizers promote more blooms; however, a deficiency of phosphorous does inhibit blooming; a soluble 15-30-15 fertilizer at 1 tpg. about once every tw... Read More

FIBERGLASS: Cleaning Roofs of Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use one ounce of High Test Hypochlorite (such as Clorox) in a gallon of water and use as an algicidal, fungicidal and bactericidal scrub or spray; rinse with water. A70-589+ Read More

FIBERGLASS: Compared with Glass

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Orchids grow as well under fiberglass as under glass; in Ohio glass is preferred because of lower winter light. A75-876 Read More

FIBERGLASS: Diffuses Light Almost Completely

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago There are no direct beams aimed at leaves; overall greater light intensity can be tolerated under fiberglass without burn; the greenhouse is less of a heat trap under fiberglass; leaf temperatures ... Read More

FIBERGLASS: Polyester Type, Cleaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Clean with trisodium phosphate solution and a scrub brush; then . remove loose fibers with coarse steel wool; clean thoroughly with water; dry; recoat with acrylated refinisher by brush; treatment ... Read More

FLASKING FORMULAS: And Nutrient Solutions

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For an extensive list of formulas and their component chemicals or substances, refer to W1-589+ Read More

BARK IN POTS: Laced with White Thread-like Fungus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A common wood-rotting fungus; may check growth if not fertilized well with nitrogen. A71-249 Read More