Category: Orchid Doctor

LEAVES: Sunburned

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The best treatment is to remove only the badly burned ones; partly burned ones are unsightly but still functional. A69-130; A75-906; A79-334 Read More

LEAVES: Testing for Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The expert relies solely on visible symptoms on leaves where they are apparent; the lower portion of a maturing leaf in doubtful cases can be sent for instance to Florida West Coast Scientific Labs... Read More

LEAVES: Transpiration

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The technical principles involved for the grower; refer to AU85(1)-31 Read More

LEAVES: Variegated Green and White

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The plant was negative when tested for virus; it is possibly a variegated sport. A61-658; illus. of an awarded plant. A77-831 Read More

LEAVES: White Patches

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Check the Mg and Fe levels in the fertilizer and increase one or both. Au84-204 Read More

LEAVES: White Patches on Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Most likely this is caused by cold damage which results in sunken cell-wall collapse, likely on plants too near a cold wall or under a cold-water drip; always use water for watering which is warmer... Read More

LEAVES: Whitish Build-up From Minerals in the Water

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Additive available to dissolve it: use mild detergent to help remove the deposit; an ion-exchange demineralizer is expensive; do not use water softener. A77-314 Read More

LEAVES: Wilting Without Changing Color, Leading to Death of Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Too little light can cause it, or excessive wetness; check the roots for root aphids or fungus. A71-345 Read More

LEAVES: Wrinkled Front Ones

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This suggests a cultural failure, so check the roots first and then the other cultural practices. A85-1118 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