Category: Ailments

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

INSECTICIDES: Guidelines on Their Application

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Apply them only when the sun is down; when the foliage is dry and the pots wet; use those products which are least toxic to humans; use wettable powders for all concerned; take precautions from fir... Read More

INSECTICIDES: Harmful Sprays

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Species that can be damaged when in tender new growth include catasetums, cycnoches and mormodes. ODA77(4)-5+ Read More

SHEATHS: Infection, Bacterial

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

SHELF LIFE: Of Insecticides and Fungicides

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

SHEATHS: Yellowing on Dozens of Apparently Healthy Plants

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

INSECTICIDES: When Not to Use

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In Florida never apply them when the temperature exceeds 85 or 90 deg.F.; spray in the late afternoon to avoid much injury to plants. DK23Never use them on wet foliage, or when the sun is shining o... Read More

CROWN ROT: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It usually affects phalaenopsis; also called Southern blight (which see); dip plant in Natriphene. S201 Read More

INSECTICIDES: In the Home, for Spraying

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use a clear plastic garbage bag about 30 inches by 40 inches; place layers of newspaper on bottom of lengthwise bag; place problem plants inside up to a dozen or so; use a sprayer with plastic open... 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