The Orchid Doctor Articles under the Heading Spots

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SPOT INFECTION: Bacterial Ailment 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 condensation on leaves; fans help considerably; do not spray bactericide. A71-609 0
SPOTS, BROWN: Appear on White Cattleya Blooms More Than on Colored 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 0
SPOTS, DOUGHNUT-LOOKING: On Phalaenopsis Leaves 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 0

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