Category: Orchid Doctor

WEED CONTROL: On Greenhouse Floors

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spray with Simazine 80W, or Telvar, or borax. A67-799+; A71-609 Read More

WEED CONTROL: On Potting Media

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Three herbicides are recommended: Monuron (Karmex W, or, Telvar), Diuron (Karmex DW) and Princep 80W (Simazine 80W); for precise instructions on their use, refer to AH52 Read More

WEED CONTROL: With Simazine Herbicide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Experiments on weed control in pots of cattleyas, dendrobiums and vandas; results of extensive testing showed high effectiveness and low or no toxicity to plants. A63-521+ Read More

WEEDS: Control in Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spray with 50% chlorox solution with a wetting agent; the elimination of oxalis, chickweed and mustard means fewer insects in the area. A88-256 Read More

WEEVILS: Black Vine Weevil

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It eats leaves of plants and petals of flowers; drench the pots with Diazinon 50% WP at 2 ttpg. A78-309; adults can be controlled by fumigation with Lindane or by use of Derris dust. OR79-227 Read More

WEEVILS: Characteristics and Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It was once a destructive pest; now in many places no more a problem. AH7; in northern areas a small black weevil (black vine weevil?) cuts scallop-shaped pieces out of edges of flowers at night; t... Read More

WEEVILS: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lindane is useful, at a formulation lower than recommended; it is toxic at LD50-1/2 oz. A68-583 Read More

WEEVILS: Insect

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Vine weevil a common pest; they are black about 15mm long with a prominent snout; unable to fly they move slowly and can be easily caught with a flashlight; they cut notches in leaf and flower edge... Read More

WEEVILS: Types and Damage

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago There are many of them and most are nocturnal ; they damage leaves, pseudobulbs, flower stalks, sheaths, flowers, by eating them; some prefer paphiopedilums; they lay their eggs at the base where m... Read More

WET-GROWING METHOD: To Avoid Build-up of Solutes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Keep the plants sopping wet particularly cattleyas and other hard-leaved genera; the solutes in the water supply are never allowed to get beyond the concentrating state to the crystallizing state, ... Read More