Category: Ailments

NATRIPHENE WP: Harmful Effects on Phalaenopsis

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago One slight case observed; the damage was more likely caused by the ailment than the antidote. A73-991 Read More

MOLD, SNOW: Characteristics and Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It grows in the potting media and envelopes the roots so they are cut off from water and air; repot the plant, destroy all mold and media; immerse the bottom half of the plant in Physan l.5 tpg.; r... Read More

MOLD, SNOW: In Bark

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It does not harm the roots except to use the nitrogen which the plant would normally need; it also contributes to compost breakdown; use Maneb but not Benlate. OR82-102 Read More

BACTERIAL LEAF ROT: On Leaves of Ascocendas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Bordeaux mix not very effective against bacteria; try Physan at 15 ml. per gallon of water. A74-792 Read More

BACTERIAL ROT: Control Recommended

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Agri-mycin at about one-fifth the recommended dosage; spray no more than four times a year; if used more often it may cause deformities in flowers; use any time as pot treatment. OD73-139 Read More

BACTERIAL ROT: Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Rots caused by Pseudomonas can only be limited or arrested by a full dip in a bactericide such as Physan 20, at 15 ml. to 4 liters of water (3tpg.), a teaspoon is 5ml.; cut out diseased parts befor... Read More

BACTERIAL SOFT ROT: Erwinia Carotovora, a Bacillus

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Incurable; rare; destructive; cattleyas most affected; destroy immediately rather than trying to heal; water-soaked green spots on leaf break open at slight touch; exudation contaminates the bench ... Read More

NATRIPHENE WP: 1:2,000

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Meaning: approximately 1 tablespoon to four gals, water, or, approximately three-quarters of a teaspoon per gal. water; as used for a drench; for a spray use at 2.5 ounces per 100 gals. water, or o... Read More

MOLD, SNOW: Vinegar Dip

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago This has been recommended as a way to "discourage" it: one part of cider vinegar is added to 20 parts of water as an acid solution as a drench. Fitch -- All about orchids. (1981)-219 Read More

PESTICIDES: Shelf Life

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They should be purchased for short-term use; mark the date of purchase on the container; most keep their effectiveness for two or more years if stpred properly; signs of ineffectiveness in dusts an... Read More