Brown Spots |
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BROWN SPOTS: Bacterial Disease
Pseudomonas cattleyae; affects many genera; starts as soft water-soaked lesion becomes brown or black; advances rapidly; kills seedlings; occurs on leaves of older plants; spreads to growing point; exudates; highly infectious; on cattleyas it is limited to older leaves and is generally not fatal; spray with Physan at 1.25 tpg. monthly; use Natriphene three-quarters tpg. (1:2000) or Tersan 75. B39; BU48
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BROWN SPOTS: Caused by Bacteria
Phytomonas (Pseudomonas?) cattleyae; affects cattleyas and others, especially serious on phalaenopsis and young seedlings in community pots; soak plant in Anti-Damp or Natriphene. A73-815
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BROWN SPOTS: Caused by the Bacteria Pseudomonas Cattleyae
It affects phalaenopsis and others; control with Fermate, Benlate, then use Physan. Fi81-218
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BROWN SPOTS: On Cattleyas
May be caused by excessive spraying with chemicals. A75-618
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BROWN SPOTS: On Phalaenopsis
Bacterial rots are caused by cool, moist conditions; keep foliage dry and lower the humidity at night; follow scrupulous sanitary measures; the fungicide Subdue is effective but expensive at $75.00 a quart. A85-605
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