Category: Orchid Doctor

PSEUDOBULBS: Shrivelling

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On cattleyas this means that humidity is low or that the potting medium is loose and is providing poor moisture distribution. A75-876 Read More

PSEUDOBULBS: Shrivelling During Rest Period

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Backbulbs may shrivel but those with leaf should not; you do not have to water on a humid cloudbathed tropical mountain.' A70-535 Read More

PSEUDOBULBS: Twisted Bulbs on Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago These can develop for no apparent reason, except that water lodging in immature growths may be the cause. A85-832 Read More

PSEUDOBULBS: Wrinkled

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Back bulbs three to four years old show the natural aging process; it is hastened by over-watering and poor cultural practices. A78-309 Read More

PSEUDOMONAS CATTLEYAE: Brown Spot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It affects cattleyas, phalaenopsis and others; starts as soft, water-soaked lesion, becomes brown or black; advances rapidly; exudate is very infectious; destroy infected parts; spray with Physan a... Read More

PSEUDOMONAS CATTLEYAE: Common in Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The diseased part should be cut out with a clean razor blade; tap the contents of a Chloromycetin 250 mg. capsule (available from veterinarians) across the cut. OD87-156 Read More

PSEUDOMONAS CATTLEYAE: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A bacterial pathogen; mild effect on old leaves but can be epidemic on cymbidium seedlings; recommend control with Natriphene, Physan, tetracyclines, Polymixin B. OD67-50Its characteristics; its se... Read More

PSEUDOMONAS CATTLEYAE: In Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Submerge the plant in Natriphene solution 1:2,000 or three-quarters of a teaspoon to a gal. of water; repeat in five to seven days. A66-204 Read More

PSEUDOMONAS INFECTION: Of Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An infection common in cattleyas and others; recognizable as clearly delineated sunken black spots generally confined to one leaf and not fatal; local swabbing with a modern control at correct solu... Read More

PUMICE: Agricultural Grade

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Suitable fertilizer for plants grown in it is 10-10-10; pumice is not like bark which requires extra nitrogen to produce good growth. A61-904 Read More