Category: Orchid Doctor

VIRUS: In Native and Cultivated Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Table showing incidence of CMV and ORV in 17 main genera and 5 3 miscellaneous genera; none out of 438 native genera was infected; 362 out of 1312 culti- vated genera were infected. A83-255 Read More

VIRUS: In the Wild

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cypripedium acaule -- in the woods in Manitoba was found to have symptoms which were identified as virus by Plant Science personnel. CA84(2)-19 Read More

VIRUS: Incidence

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Table showing frequency of infection of about 2 0 genera by CMV and ORS and related to length of time in cultiva- tion; refer to W10-281 Read More

VIRUS: Indicator Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Five plants listed with details ; refer to AH86-15; seed for Gomphrena globosa and Cassia occidentalis can be purchased from suppliers; address given. A86-251; six plants listed, with details of us... Read More

VIRUS: Interferon Seen as Inhibitor

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Minute amounts sprayed on a plant can stop a virus infection in an hour, is harmle s s to plants and humans; scientists are experimenting. CA84(3)-19; AU84,Sept. Read More

VIRUS: Maintaining a Clean Collection

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Procedures recommended: No drip to pass from one plant to another, Use no pot a second time, Flame sterilize wire pot-hangers, Re-use no drainage materials, or stakes, or potting materials, Divide ... Read More

VIRUS: Modes of Transmission

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago By insects, mostly aphids and leaf- hoppers, grasshoppers and beetles; seed and pollen are less common transmitters; meristerns almost always carry virus if the parent was infected; mechani cal tra... Read More

VIRUS: Non-viral Symptoms

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Chlorosis, spots, dots, tip and marginal burns, scorching, water-soaked areas, green and yellow flecking, injuries due to insect feeding, pesticide spray damage; accurate diagnosis is necessary. AH... Read More

VIRUS: Number Affecting Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago At least 18 viruses cause various, often destructive diseases known as ringspot, mosaic, mottle, streak, necrosis, etc. AH86-2 Read More

VIRUS: Persistence

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago When plant parts decay virus is disseminated into the environment; destroy the plant. OA84-112 Read More