Newly Posted Articles

OEDEMA: Blistering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On cattleya leaves, small raised hard nubby features rise, especially on the backside of the leaf with a corresponding front-side depression, caused when cells take up more water than needed, then ... Read More

OFF MIX: Composition, Altered

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 7 pts. fir bark medium size, 1 pt. coarse German peat, 1 pt. Palco wool; to each cu.ft. add: 3 lbs. pulverized limestone, 1 lb. single superphosphate, 1/2 lb. processed tankage, 1/2 lb. of 5-10-5 f... Read More

OIL, DORMANT: With Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A favorite is a combination of dormant oil with Malathion, or Isotox (without Orthene). A87-1259 Read More

ONCIDIUM KRAMERIANUM: No New Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is characteristic of this plant to bloom without interruption, given enough light and good care; to stimulate vegetative growths, cut off the flower spikes. A63-391; OD78-42 Read More

GXBBERELLIC ACID: Effect on Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Three bulb divisions were treated with Ethylene Glycol Ether Gibberellate 0.6% in a solvent 5.1 acetone; isopropanol system; spray was directed at spikes using atomizertype hand spray to point of r... Read More

GXBBERELLIC ACID: Effect on Dendrobiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The acid at four different concentrations was used on 325 pseudobulbs; treatment with 7.5 ppm. soaked for ten minutes twice with one day interval produced the most sprouts. A62-986+ Read More

GYPSUM: Supply of Calcium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is not highly alkaline, is available as a powder which should be useful in a tight potting mix but will wash out of a loose or open mix; pellets of it can be made by mixing Plaster of Paris with... Read More

ONCIDIUM RINGSPOT: Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The mature leaves show rounded, slightly sunken yellow areas on both surfaces of the leaf; the spots on one side do not correspond to those below; they age to a necrotic, purplish brown appearance;... Read More

PAPHIOPEDILUMS: Pots and Their Influence on Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Growing them in clear plastic pots produced an improvement in growth almost unbelievable; in dark plastic pots the plants were sick; in clay many grew well. A69-573+ Read More

CYMBIDIUMS: Hardening of Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They stand up better if cut after 10 full days after opening on the stem. A63-896 Read More