Newly Posted Articles

LAVA: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Occurs in many varieties differing in structure and constitution; has many ideal growing characteristics; pumice is one variety; its advantages; refer to C72-70+ Read More

EMBRYOS: In Phalaenopsis Pods

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are mature enough in three months to be cultured. A73-709 Read More

LEADS: Broken Off Accidentally

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The broken lead will not root itself with the aid of a hormone and should be discarded, as a new lead should develop beside it or below it. A82-37 Read More

LAMPS: Gro-lux

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Their effect on the growth of seedlings was superior under controlled conditions to the growth under greenhouse conditions. A64-948Their effectiveness = the Sylvania company has published informati... Read More

LEAF BURN: Caused by Sun

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Too much sunlight causes temperatures of leaves to rise above 105 deg.F to 110 deg.F.; depending on air temperature and the leaf aspect to the sun; tops of leaves have less water and burn easier. A... Read More

LEAF COLOR: As Indication of Health

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Phalaenopsis and a few similar genera should have leaves firm, succulent, medium to dark green; others should be like grass touched lightly with the sun, a medium yellow green. A72-118 Read More

LEAF ROT: Erwinia and Sp. of Pseudomonas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Stimulated by warm, damp weather; areas are yellowish or brownish and watery; the bacteria spread quickly; cut off whole leaf; soak the plant in Anti-Damp or Natriphene. A73-815 Read More

LEAF TIP BLACKENING: On Main Leaflet of Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by Phytophora or Pythium diseases; best controlled by Truban (ethazole) at 1 tpg.; avoid syringing with water at adverse times. A79-1112 Read More

LEAF-SPOT: Diplodia Laeliocatleyae

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Small yellow areas on top and bottom of leaf turn brown, become black and greasy; spray with fungicide such as Fore/ Dithane; Benlate is not effective in this case. AH86-70 Read More

LEAF-TIP NECROSIS: Causes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is a nutritional and compost problem and is not caused by fungal attacks as is commonly supposed; an unhealthy root system is likely at the base of it. AU84-199; it can be caused by a mix which ... Read More