Category: Orchid Doctor

TETRAPLOIDS: Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A clone in which the chromosome count is four times the haploid or standard number; generally indicated by 4n. AU78-47 Read More

TEXTURE: Definition

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Means the sheen or surface qualities of a flower and not its substance. ODA72-135 Read More

THERMOMETERS: Good and Bad

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A mercury thermometer is not the most accurate; a good dial-read type is more accurate; good ones are accurate to the manufacturer's specifications; 17, accurate types will not be off more than 1.2... Read More

THIRAM: Toxicity Reactions in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It irritates the skin, eyes, stomach ulcers; injures liver and kidney; depresses the brain; violent reaction in association with liquor. A68-583; only if one ingests 1 oz. or more. OWD Read More

THRIPS: A Common Pest on Vandas

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Inside the bud, thrips are protected from insecticides, so it is a good idea to spray early; if late use a fine spray or a misting to avoid injury; use Sevin SOW; if flowers are open use Black Leaf... Read More

THRIPS: Characteristics and Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago There are both winged and wingless phases; they scrape the surface tissue of plant parts especially flowers, causing shallow, silvery scars; they are fast moving and hard to see; spray with Malathi... Read More

THRIPS: Control If Malathion Has Not Been Effective

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The Malathion used must have been old; use fresh Malathion, spray at 1.5 tpg. every five to seven days, with three applications; or spray with Zectran at 3 tpg. A72-1100 Read More

THRIPS: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Spray the young spikes preventively with Sevin 50W (Carbaryl Insecticide) in its wettable powder form; when the flowers open spray with Black Leaf 40 (nicotine sulfate); some growers use Orthene 75... Read More

THRIPS: Controls, in Increasing Degrees of Toxicity to the User

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Malathion (LD50=2oz.), lindane (1/2 oz.) and dimethoate (1/2 oz.) A68-582 Read More

THRIPS: Distinct From Springtails

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Thrips also can be found in compost, they damage the roots at the conjunction of the new growing tip and the developing velamen, an area rich in sugars; control them with Malathion. OR82-256 Read More