Newly Posted Articles

DIPLOIDS: Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The vast majority of living things are diploid (twice haploid) but the haploid varies between genera and sometimes between species; diploid or 2n number for a cymbidium is 40, for a dendrobium 38 i... Read More

INSECTICIDES, SYSTEMIC: For Red Spider

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use Murphy Systemic System Insecticide twice at a ten-day interval followed three weeks later by two further sprays of PBISystemic Insecticide, then monthly thereafter alternating the two; effectiv... Read More

XEROPHITIC ORCHIDS: Some Examples

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The genera include Angraecopsis, Cyrtorchis, Jumellea, Microcoelia, Rangaeris, Tridactyle and Ypsilopsis; plus Oncidium onusturn and Epidendrum boothianum. A80-1140 Read More

INSECTICIDES: Emulsifiable Concentrate (e.c.)

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A creamy liquid; if free oil droplets float on the prepared mix the emulsion has broken down and must be discarded. SA84Dec-135 Read More

INSECTICIDES: Guidelines on Their Application

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 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 almost 8 years ago Species that can be damaged when in tender new growth include catasetums, cycnoches and mormodes. ODA77(4)-5+ Read More

HEATERS: Emergency

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Electric heater causes parching of plants; deflect the hot air stream away from plants, increase the humidity; or, try a polyethylene tube prepunched with holes. A77-619Manually operated propane bu... 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

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

DISEASED PLANTS: Removal of Affected Parts

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Virused plants are usually affected throughout, destroy the plant; bacteria: remove parts when the first visible symptoms appear; fungi: remove spotted leaves particularly if the spots appear on th... Read More