Category: Orchid Doctor

COLD PROTECTION: In Texas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Details of winter cover of polyethylene supported by wood frame and clothesline for temporary structure in emergency. A86-918 Read More

COLD PROTECTION: Of Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A killing frost is about 27 deg.F; to protect exposed plants, carry them indoors; in a semi-closed area burn hibachis or wood stoves to keep temperature above freezing; cover area with polyethylene... Read More

COLD TOLERANCE: Plants Most Susceptible to Cold

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Angraecum, dendrobium, grammatophyllum, phalaenopsis and vanda. F74-165 Read More

COLD TOLERANCE: Plants Most Tolerant of Cold in Florida

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cattleyas for the most part, epidendrums, oncidiums, except Onc. ampliatum, laelias, brassavolas, miniature cymbidiums; not tolerant are phalaenopsis, doritaenopsis; ascocendas, dendrobiums, renant... Read More

COLLAR ROT: Orchid Wilt

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

COLLEMBOLIDS: How to Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They seldom damage plants; control them by drenching with solution of 2 tpg. Malathion 50-57%. A80-1141 Read More

COLOR BREAK, MILD: Caused by Both Major Virus Infections

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Chlorotic streaking appears in new leads, disappears in mature leaf; an illusive disease; plants can act as carriers to other plants where symptoms become more readily noticeable. A73-818; N322 Read More

COLOR BREAK, SEVERE: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Another disastrous disease caused by "severe color break disease"; color is patchy with ugly areas of pigmentation; it sometimes deforms flowers; plant is also affected -- new leads appear with ros... Read More

COLOR BREAK, SYMMETRICAL: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Dark pigment outlines sepals and covers all but the median area of the petals; it is a virus. N322 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