Category: Orchid Doctor

BUD DROP: In Dend. Phalaenopsis Types

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are highly susceptible to damage by ethylene caused by gas heaters, wood-burning stoves, open fireplaces, burning brush outside the greenhouse, and unvented propane burners. A81-810 Read More

BUD DROP: In Late Fall and Winter

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Especially noticeable in Dend. phalaenopsis types; it is caused by water stress when heating conditions change suddenly and indoor warmth causes plants to lose moisture faster than the roots can su... Read More

BUD DROP: In Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by sudden temperature drop especially in early winter when one sunny day there is a fast heating lip of the greenhouse and as quick a drop at night. OD86-139 Read More

BUD DROP: In Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Air polluted with ethylene is the main reason. A74-502Caused by air pollution, lack of vigor in the growth, improper temperature range, or inadequate light. A81-266Ethylene is the only cause; it ca... Read More

BUD INITIATION: How to Induce?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When sheath is on plant, give good light intensity, short days, cool nights below 60 to 62 deg. F.; for Cattleya mossiae provide below 56 deg.F. A70-1099 Read More

BUD REMOVAL: Will Size of Cymbidium Flowers Be Improved If Alternate Buds Are Removed?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago No appreciable change will occur; de-budded spikes are excluded from judging. A70-235 Read More

BUD ROT: In Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by Erwinia cyprepedii which also commonly attacks base of leaves; watering procedures do not seem to be a factor; strong air movement 24 hours a day controls it partly; drenching plants with... Read More

BUD STEMS: They Curl Before Emerging From Sheath

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Possible sticking of buds in sheaths is due to failure of the sheaths to open in a dry atmosphere. A73-208 Read More

BUDS: Black Inside Cattleya Sheaths

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Rather common condition; to avoid it, when the buds appear clearly in shadow, cut off 1/2 inch from top of sheath; probably caused by sudden temperature change. A81-1436 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