Category: Ailments

PHYTOPHTHORA: Black Rot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Controls recommended: Captan at 1 ttpg.; Dexon at 1.5 ttpg. used as a spray or drench, where the whole plant is immersed. P71(2)-24; controls: Truban, Banrot, Physan 20. A80-356 Read More

PHYTORHTHORA: Black Rot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It may also be caused by Pythium ultimum most destructive on cattleya types; high humidity favors it, so water into the pot and not on the leaves; control it with Truban drench at Hpg. AH86-72 Read More

PILL BUGS: Infestation in Cattleya Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spray Diazinon 50%WP on the surface at 1 ttpg., or 1 lb. per 50 gals, water. A75-500 Read More

PLASTICS: Toxic to Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Non-orchid plant seedlings have been killed in new glass houses by a plasticizer called dibutyl phthlate (DBP) but not by a related product called didecyl phthlate; DBP occurs in some PVC pipe used... Read More

PLASTICS: Toxic When Burned

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A hot soldering iron when used to burn holes in plastic pots for more drainage, causes hydrogen chloride gas to be released, which is extremly toxic to both man and plant. OIE87Nov-10 Read More

LEAF NECROSIS: Severe

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is caused by Cymbidium necrotic ringspot virus; deadly but rare; new and old growths are killed; destroy plant. N323 see also Necrotic spots Read More

ARASAN: Greenhouse Chemical, Toxicity Reactions in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Irritates skin and eyes; stomach ulcers, injures liver, kidney; depresses brain; violent reaction in association with liquor. A68-583 Read More

BOTRYTIS: Petal Blight

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It can affect flowers in moist, cool and stagnant air; increase air movement and ventilation; spray with Benlate or Physan 20; illus. A66-558; A75-907 (illus); A77-436; cut off flowers. S204 Read More

POISONING: By Pesticides

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Symptoms: include collapse, convulsions, cramps, diarrhea, difficulty in breathing, dizziness, loss of coordination, nausea, nervousness, sleepiness, salivation (excessive), staggering, tremor, unc... 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