Category: Ailments

MITES, SPIDER: Also Called Red Spider Mites, or Two-spotted Mites

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago They are troublesome on thin-leaved genera such as cymbidiums and cycnoches; they cause fine stippling, white scars, or silvering, of undersides of leaves; on buds and flowers they puncture along t... Read More

MITES: Biological Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Most cymbidium nurseries use the predator mite Typhlodromus occidentalis, or Phytoseinlus persimilis for control and reports are mainly in favor. Au88-13 Read More

PHYSAN 20: Algicide, Bactericide, Deodorizer, Fungicide and Viruscide

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is useful in wet and humid places; can sterilize some cutting instruments if immersed for about 12 minutes. A73-811 Read More

PHALAENOPSIS: Buds Turn Yellow

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In winter, if there is no ethylene contamination, the plants need more light. OB86-220 Read More

VIRUS IN PLANTS NAMED: Unsuspected in Popular Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In many commercial and private collections reed-stem epidendrums, including E. ibaguense, are infected with Cymbidium Mosaic virus and show only mild symptoms but they act as prime infectors of oth... Read More

BEER: As Bait for Slugs and Snails

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Fill a small container such as a thimble with beer and sink it in the earth to ground level; prime with beer around the edge; add a small amount of metaldehyde to the beer; snails can't get out aga... Read More

SHEATHS: Yellowing

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Causes are not fully known, although ethylene can be suspected; some plants produce sheaths which yellow than go brown before the buds are initiated and they still flower normally. A82-122 Read More

CYMBIDIUMS: Root Injury in Potting

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Nearly every root more than two inches gets broken in repotting; this has little effect on the plant's ability to grow and bloom on time. A64-583 Read More

THRIPS: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Spray the young spikes preventively with Sevin 50W (Carbaryl Insecticide) in its wettable powder form; when the flowers open spray with Black Leaf 40 (nicotine sulfate); some growers use Orthene 75... Read More

COLOR BREAK, SYMMETRICAL: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Dark pigment outlines sepals and covers all but the median area of the petals; it is a virus. N322 Read More