Category: Orchid Doctor

SPOROTRICHOSIS: Infection Contracted From Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Sphagnum moss, bark, can carry when wet a subcutaneous infection caused by a fungus Sporothrix schenckii that gains entry through skin lesions; refer to Ca81(2)-19; ITporotricum schenkii, AU85(2)-19 Read More

SPORTS: Mutations; Variant Offspring

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Visibly different plants in a group of meristems are somatic variants or bud sports, a small percentage of the whole and mainly disappointing as far as improvements are concerned. OIE88Jan-5 Read More

SPOT INFECTION: Bacterial Ailment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is found on phalaenopsis especially, and on cattleyas; hyaline (glassy, transparent) spots or depressions are not systemic and can be stopped by keeping the foliage dry at night; avoid condensat... Read More

SPOTS, BROWN: Appear on White Cattleya Blooms More Than on Colored

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Practice is to spray with Captan 50% weekly, and with Natriphene intermittently; the spraying of chemicals is excessive; spray only two or three times a year. A75-618 Read More

SPOTS, DOUGHNUT-LOOKING: On Phalaenopsis Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Likely the fungus disease anthracnose; remove the damaged leaves; spray with Fore (Dithane M45) at 1.5 ttpg.; dry leaves before night by use of a fan. A70-345 Read More

SPRAY EQUIPMENT: Rinsing Materials

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use plain water first on the equipment after it has been used; then use household ammonia at one part to five or ten parts water; then lastly plain water. A78-1124 Read More

SPRAYING INSECTICIDES: Safety Code

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago L. Read cautions and warnings on the container label each time used. 2. Lock up all chemicals; Don't let children use them; Keep them in the original container. 3. Don't use them close to an open f... Read More

SPRAYS: Against Fungus and Bacteria

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Physan 20 appears to be an effective bactericide, and it also kills some fungi; the most effective fungicide is Benlate; could be used in a program several times a year. A76-698 Read More

SPRAYS: Combination

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A mix of fertilizer, Cygon 2E and Benlate is not recommended because amateurs are inclined to use pesticides in excess and chemical toxicity problems are frequent with amateurs; many top growers do... Read More

SPRAYS: Dormant

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Recommendable types do not exist because they may well kill the plants; such sprays are intended for plants in dormancy in cold weather and there is no such orchid; use Malathion. A64-786 Read More