Category: Ailments

PSEUDOBULBS: Rotting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When this happens, open up the potting mix if it is dense; watch for water with nutrient in the leaf joints which can cause bacterial damage; peat moss and sand in t he mix can also contribute to i... Read More

BUDS: Fail to Open, Dry Up and Fall Off

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Gas heater should be checked for ethylene emission. A77-449 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: 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

PYRETHRINS: Extract of Chrysanthemums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Its toxicity reactions in humans: local anesthesia, intestinal distress, headache, ringing in the ears, etc; A68-583; LD-50 is 1,500; relatively safe. OWD Read More

PYRETHRUM: A Safe Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A powder, it can be used in the home, is available as an aerosol spray to be used on flowers on indoor plants; is harmless to bees, but kills ants, aphids, thrips, caterpillars, white fly; it usual... Read More

PYTHIUM BLACK ROT: And Damp-off

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by Pythium ultimum; it requires free water in order to spread; community pots are most vulnerable; on older plants black spots should be cut out and the plant soaked in Anti-Damp or Natriphe... Read More

PYTHIUM BLACK ROT: On Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Treatment: drench the plant in Truban at one ounce to 25 gals. water, or 1 level teaspoon in 3 gals. water. A74-34 see also Black rot; Dry rot; Leaf blight; Leaf tip blackening; Pythium ultimum Read More

PESTICIDES: Shelf Life

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