Category: Ailments

PHYSAN: Its Various Uses

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It can be used for cleaning benches, sterilizing pots, etc. at lttpg.; for treating damping-off on seedlings at 1|tpg; for combating bacterial rot, at 2tpg. A82-487 Read More

BROWN SPOTS: Bacterial Disease

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago 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;... Read More

PHYSAN: Not Registered for Use on Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Its use could be authorized by the U.S. Dept. of Agriculture; it requires sufficient pressure brought to bear through petition. A86-915 Read More

DISEASES: Characteristics and Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For a detailed look at every disease recorded, with probable or actual cause, extent of distribution, symptoms, controls, refer to OBIV-Appendix Read More

DISEASES: Parasitic: Bacterial, Fungal and Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For causes, descriptions and methods of countering, refer to N311+ Read More

SPRINGTAILS: Tiny Insects in the Pots

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Two to three mm. long, white in color with two front "feelers"; they move and jump erratically, leave shedded "bodies" under the pots; can be controlled by spraying an insecticide around and into t... Read More

BUDS: Deterioration in Sheath

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is not a disease; plant probably lacks food reserves if it has been grown under too much shade; save buds by removing sheaths before they turn brown. A71-535 Read More

BUDS: On Phalaenopsis They Blast and Drop

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Ethylene only is the cause, sometimes intensified by atmospheric conditions. A68-811 Read More

PSEUDOBULBS: Black

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A fungus disease causes this on cattleyas; control it best by watering in the morning and provide good air circulation. A68-1107 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