Category: Orchid Doctor

EARTHWORMS: In Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Control with a drench of insecticide; Zectran is a wide-range insecticide which also controls slugs and snails; malathion is effective against worms and millipedes when used as a drench. C71-199 Read More

EARWIGS: Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Dust surface of composts with lindane dust, or use lindane smoke; trapping is effective, use match boxes with litter inside; use orange peel halves containing grass or hay; use pots reversed on the... Read More

EARWIGS: Harmful to Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Are of minor importance and can be controlled with normal insecticide sprays. A87-33 Read More

EDEMA: Blisters or Cracking

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by the plant drying out and suddenly then getting more water than it can absorb, guard cells swell and rupture, leaving little scars; use a very light mix and water oftener. OIE85My-5 Read More

EGGSHELLS: In Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When crushed they are a good deterrent to slugs; cymbidiums like it in the mix, like crushed oystershells. OIE86Sept-7 Read More

ELECTRIC CONDUCTIVITY: For Early-flowering Cymbidiums Culture

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In April, May during flower-bud induction have an E.G. of 0.3; in July-August and continuing into the flowering period an E.G. of 0.8 with an increase in potassium recommended from August on. OA87-200 Read More

ELECTRIC CONDUCTIVITY: For Late Flowering Cymbidium Culture

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In April-May an E.G. of 0.6 to 0.8; from end of July to early August an E.G. of 0.3, possibly a few weeks without fertilization; from August (end) to November an E.G. of 0.6 to 0.8 with potassium i... Read More

ELECTRIC CONDUCTIVITY: Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The measure of current flow (of fertilizer) passing through water, determined by a reading on a meter connected to the water line; similar to the concept of Parts Per Million. OA87-163; 200 Read More

ELEVATION: And Habitat Preference

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For a chart of 125 angraecoids from 7,000 feet to sea level, refer to Hillerman's Cultural manual for Angraecoid orchid growers (1983) 25. Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More