Category: Ailments

BLISTERS: On Phalaenopsis Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago If round, and look water-soaked, they are probably botrytis fungus; keep humidity lower at night; use a fan; water early in the morning. A72-412 Read More

BUSH SNAILS: Behavior and Control

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Snails go deeper as the pot dries out; most effective surface spray is with metaldehyde but spray is not as effective as soaking; spray first with water,wait two or three hours then apply; most eff... Read More

PESTICIDES: Recommended Names

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For a list of 22 substances usually used in greenhouses, with their LD50 rating, and useful notes, refer to N314 Read More

CROWN ROT: Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use Physan 20 or Natriphene; crown rot is not controlled by Benlate. A77-209 Read More

BANROT: Can It Be Used in Small Doses with Each Watering?

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It does no good whatever, because Banrot must be used in prescribed amounts to be effective, usually 1 tpg. A82-1061 Read More

PESTICIDES: Non-use

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Some good growers rarely use them; they rely on good culture, with pest-free results. A76-698 Read More

LEAF BLIGHT: Also Known as Leaf Die-back, Tip Burn

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Caused by fungus invasion; spreads gradually through leaf; cut it out before treating; infected areas show watery before drying; control with Benlate, or Anti-Damp, or Tersan. RMH Read More

PESTS AND DISEASES: Rundown

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Sixteen insects harmful to orchids; six fungi and bacterial problems briefly described and prescribed for, refer tc OD82-105 Read More

PHALAENOPSIS: Bacterial Disease

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Erwinia cyprepedii is the probable cause; the recommended treatment for it, Natriphene, failed; try cultural practice as outlined fully; spray with Tersan 75 at 1 tpg, three times spaced fortnightl... Read More

PESTICIDES: Shelf Life

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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