Category: Ailments

PESTICIDES: Chemicals

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For a list of those used in plant disease control, with both common and chemical names, their Lethai Dose-50 rating and their use as either systemics, fungicides, disinfectants, bactericides, algic... Read More

PESTICIDES: Classification

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Chemical relationships: Organo-phosphates: Parathion, TEPP, Sulfotepp, Dibron, Systox, Metasystox-R, Thimet, Cygon, Diazinon, Ethion, Malathion, Vapona; 2: Chlorinated hydrocarbons: Chlorobenzilate... Read More

PESTICIDES: Compatibility Charts

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Charts of pesticides that can be mixed before applying have been published; two addresses given; Kelthane and Malathion are compatible. A69-793 Read More

CYMBIDIUMS: Bud Blast

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago During fall months spikes that are exposed to strong sunlight may "blast"; it is aggravated by cool to cold nights with low humidity by day; aphids may also be a cause. A66-408 Read More

CYMBIDIUMS: Bud Deformation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is impossible to use emulsion concentrates as wet sprays on spikes without deforming the buds even though the open flowers are not harmed; use wettable powders, with a wetting agent at the right... Read More

CYMBIDIUMS: Non-flowering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Most often caused, if other factors are favorable, by too much shade morning or afternoon. OD76-122 Read More

FREEZING: Damaged Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Below freezing weather in southern California caused losses of epidendrums and cymbidium spikes; refer to OIE87Jan-2Nurse them along by watering them sparingly, do not fertilize for a while and giv... Read More

ORCHID FLY: Characteristics and Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A tiny wasp; larvae feed inside flower buds, pseudobulbs or new shoots of cattleyas; once controlled by DDT; occasional infestations now reported. AH7 Read More

MILLIPEDES: Control in Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 2 ttpg. Diazinon 25% liquid concentrate applied as spray. A73-409; use Diazinon definitely; the wettable powder (WP) form is less likely to cause harm to plants at 2 ttpg, A79-4 Read More

MILLIPEDES: Damage Done

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Millipedes do not harm plants. A76-14 Read More