Category: Orchid Doctor

SHEATHS: Growth Is Poor and After Starting They Turn Dry or Brown

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The cause is not fully known; may be caused by air pollution or poor health, or not enough light; remove the sheaths, the buds will usually bloom. A76-795 Read More

SHEATHS: Infection, Bacterial

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It occurs particularly in hot, humid climates; caused by Pseudomonas bacteria; Physan 20 provides partial control; use it at 1 cc. per gal. of water as spray. A74-780+ Read More

SHEATHS: Removal Effect on Buds

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Removal of the sheath does no harm but the bud stems may be weakened. A72-55 Read More

SHEATHS: Rotting Caused by Water

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Apparently water collecting around the base of the sheath can rot both sheath and buds within; illus. A77-436 Read More

SHEATHS: Sequence of Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The sheath develops along with the new pseudobulb growth. A63-478 Read More

SHEATHS: Within Sheaths

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In cat tleyas a sheath growth inside another sheath is a heritage from Cattleya labiata which does it most frequently; why? A87-616 Read More

SHEATHS: Yellowing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Causes are not fully known, although ethylene can be suspected; some plants produce sheaths which yellow than go brown before the buds are initiated and they still flower normally. A82-122 Read More

SHEATHS: Yellowing on Dozens of Apparently Healthy Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The primary cause is not known; it is relatively normal on Cattleya mossiae and some hybrids; some may brown, soften and kill the buds; remove such. A74-34 Read More

SHELF LIFE: Of Insecticides and Fungicides

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A few mentioned: Malathion Wettable Powder 25% keeps for 2 to 3 years in a dry place. A82-920; Pentac has a short shelflife of about a year. OIE86-17 Read More

SHELL 345: Soil Fungicide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Report on its use: as a drench on established plants to maintain disease-free conditions or to reduce the activity of infections; for best performance mix into soil or medium during its preparation... Read More