Newly Posted Articles

COLLAR ROT: Orchid Wilt

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A fungus Sclerotium rolfsii affects many orchids especially cymbidiums and phalaenopsis; the stem base turns light yellow then dark brown and spreads to roots and leaves; it thrives above 85 deg.F.... Read More

CLEANSER: Instead of Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In Brazil Cleanser 409 can be sprayed on aphids with effect if insecticides must be avoided. OD87-146 Read More

EARWIGS: Harmful to Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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 over 7 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

ERWINIA CYPREPEDII: Rot in Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Also Pseudomonas cyprlpedii, can be cured by soaking the plants in Natriphene or Benlate at stated rates after all the rot has been excised with a sharp knife. OD86-168Brown areas at the base of le... Read More

ENDANGERED SPECIES: Legislation and the Facts

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Anomalies and contradictions in the CITES convention to protect animal and plant species; refer to A83-15 Read More

JEYES FLUID: Disinfectant

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Registered for soil conditioning in the U.K. it is used as a spray against such orchid pests as black spot, red spider mite; is useful for eliminating slugs and snails; has been tested on cymbidium... Read More

LAELIAS: Rupiculous Types

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Leaves should have a red tinge by being exposed to very bright light; they grow on mountain tops on rocks in full sun in winter and slight shade in summer; they need good air circulation; nightly d... Read More

HEATERS: Wood-burning Stoves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They are not recommended because they ruin most orchids unless the draft is fully open at all times to discharge fumes into the neighbour's back yard. A81-526 Read More

PH (GENERAL): Of Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Experiments show that if a recommended medium is chosen the initial pH should cause no concern. Hort. revs. 1983-195 Read More