Category: Ailments

LEAVES: On Cattleyas Are Drooping

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Check roots for possible bush snails or for over-watering; the root system is the key to healthy plants. A77-449 Read More

LEAVES: On Cattleyas Have Black Tips

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago On new growth it goes no farther than the pseudobulbs; spray with Truban or Terrazole, at 1 tpg. A79-4 Read More

ALGAE: In Osmunda Under Lights

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Usually caused by heavy organic fertilizers plus high humidity; harmful only if it excludes air from roots; use Physan 20. A79-910 Read More

ALGAE: In Pots

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use of Bioquin satisfactory,address given; Manzate (Maneb) fungicide controls algae; use 1 ounce to 4 gals. water; various basic copper fungicides also control algae. A73-888; no safe algecide know... Read More

ALGAE: In Rainbarrel

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago To destroy it add some sodium hypochlorite, then aerate to free the chlorine; exclude light by covering barrel with black polyethylene. A67-579 Read More

ALGAE: In White or Clear Pots

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In areas of strong light algae grows inside plastic pots which are translucent; dark pots exclude light. A72-490 Read More

ALGAE: Its Effect on Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Algae can be harmful to plants grown in clay or crockery pots by covering the roots, so wash it off the pots and water less. A81-688 Read More

LEAVES: On Cattleyas Show Shrivelling

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Suspect dryness of culture; cattleyas like high humidity, but too heavy watering can kill the roots. A75-1007 Read More

LEAVES: On Oncidiums Are Accordion-folded

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In a window area this could be caused by too low humidity; the effect of misting lasts only 1/2 an hour. A75-1096 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