Category: Orchid Doctor

ONCIDIUMS: Good Pollen Parents

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Those showing male preference in hybridizing as against being the pod parent; 18 plants listed; refer to OD77-101 Read More

ONCIDIUMS: How to Grow Them

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago General cultural directions for most types; refer to A79-334+ Read More

ONCIDIUMS: Sexual Compatibility Groupings

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 58 species arranged by name in four groups on the basis of sexual compatibility for breeding; six other genera grouped on the basis of their compatibility with oncidiums; much other breeding data; ... Read More

ONCIDIUMS: Terete-leaved

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lost their new grewth through rotting and blackening which may have been caused by daily (excessive) watering or because of Phytophthora or Pythium fungus,neither of which are affected by the spray... Read More

ONCIDIUMS: Watering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Many oncidiums dislike heavy watering; they need a decided reduction except when in full growth. OR75-209On repotting the mix should be open and only a sniffle of water applied, no more is necessar... Read More

OPHRYS SP.: Species and Where to Obtain Them

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Supplier's address in Germany given; grow the plants outdoors in a well-limed soil with leaf mold or limed peat moss at the rate of 1 lb. pulverized limestone per cu.ft. of peat moss. A76-1007 Read More

ORCHID CHIPS: Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A European plastic material made from polystyrene (Styropor or Polystyro 1) prepared for horticultural purposes; looks like strips of paste; retains on surface three to four times its weight in wat... Read More

ORCHID CHIPS: Styrofoam

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A potting mix, with specially textured surface to increase water retention, used in Great Britain, not available in the U.S.A., but polystyrene ground up in a meat-grinder and used 50/50 with bark ... Read More

ORCHID FLY: Characteristics and Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A tiny wasp; larvae feed inside flower buds, pseudobulbs or new shoots of cattleyas; once controlled by DDT; occasional infestations now reported. AH7 Read More

ORCHID FLY: Eurytoma Orchidearum

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Found in Florida; not a fly but a wasp about one-eighth inch; a serious threat where present; the larvae feed within the plant tissue; no control given; illus. DK14+ Read More