Category: Orchid Doctor

CYGON 2E: Systemic Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 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

CYGON 2E: Systemic Insecticides

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is the same as Cygon 2.67, or Dimethoate, or Meta-systox R. A76-795 Read More

CYMBIDIUM BACKBULBS: When to Remove From New Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago After backbulb has become established and is well rooted and beginning to form a backbulb of its own, the old bulb can be removed and used to start another growth if it is still plump. A67-45 Read More

CYMBIDIUM HOUSE: Suitable for Cool-growing Botanical Species

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 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

CYMBIDIUM MOSAIC VIRUS: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Very common in cymbidiums, less so in cattleyas and hybrids, and in phalaenopsis, epidendrum and oncidium; certain lines are infected world-wide; symptoms are highly variable; it usually begins in ... Read More

CYMBIDIUM MOSAIC VIRUS: Description

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lesions are always elongated, sometimes streak-like, are often whitish for a month or two before turning brown-grey or black and are usually slightly sunken. A82-37; place cutting tools, etc., in t... Read More

CYMBIDIUM MOSAIC VIRUS: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Produces more necrotic symptoms than in cymbidiums; dark brown or black sunken rings or streaks which tend to coalesce darkening the whole leaf; the symptoms generally are more pronounced on the up... Read More

CYMBIDIUM MOSAIC VIRUS: Most Common Virus Disease

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cymbidium Alexanderi 'Westonbirt' is infected in all its divisions; small elongated chlorotic streaks appear on the younger leaves; later widen and elongate and become sharply defined some with isl... Read More

CYMBIDIUM MOSAIC VIRUS: Symptoms and Spread

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Leaf mosaic, chlorosis, streaks or necrotic spots are visual in nature but in many plants no foliage symptoms appear; the number and size of flowers are reduced; there is no color-breaking in cymbi... 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