Newly Posted Articles

FLASKING: Black Substance in the Culture Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Phalaenopsis seedlings are notorious for exuding a black material from the roots; it is not a contaminant but in high concentrations impedes growth. F82-175 Read More

FLASKING: Delayed Contamination

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is possible when a pathogen was introduced to the sterile flask and remained lodged near the opening; it would take severa1 weeks to reach the agar medium. F82-175 Read More

CYMBIDIUM HOUSE: Suitable for Cool-growing Botanical Species

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Companion plants can include the following, all aromatic: Cattleya citrina, Epidendrum tampense; Laelia autumnalis, Lycaste aromatica, Odonttoglossum pulchellum; Oncidium ornithorhynchum, Stanhopea... Read More

CYGON 2E: Systemic Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Now considered unsuitable for some orchids; those injured include calanthes, Cycnoches ventricosum, Den. phalaenopsis, Den. moschatum. Neomoorea irrorata; "please do not use it on orchids". A86-506... Read More

MITES, TWO-SPOTTED: Spider, or Red Spider Mite

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They may be green, orange, pale yellow or red; the stippling is either whitish or brownish; damage is done on the underside of the leaves, with puncture wounds; sometimes the wounds acquire a water... Read More

MITES, TWO-SPOTTED: The Life Cycle

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago As temperature rises in the summer above 50 dF, the incubation period is reduced from 21 days at 60 dF to 6 days at 90 dF and their numbers increase in geometric proportion; use Kelthane (if you ca... Read More

DAMAGE: Ascertaining Cause of Problems

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Look for it in accordance with this order: 1, Handling damage such as bruising, cracking, tearing, etc.; 2, Cultivation, such as water or light damage, overfeeding, heating, etc.; 3, Insect damage,... Read More

MOSS: On Tree-fern Slabs or Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is a good practice to get it to grow with those plants which should not dry out between waterings; it also prevents growth of algae. A68-1007 Read More

CYGON 2E: Systemic Insecticides

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is the same as Cygon 2.67, or Dimethoate, or Meta-systox R. A76-795 Read More

PSEUDOBULBS: Twisted Bulbs on Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago These can develop for no apparent reason, except that water lodging in immature growths may be the cause. A85-832 Read More