Category: Ailments

VIRUS TRANSMISSION: By Seed Transmission

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It occurs with a few viruses in the plant world but it is rare in orchids. OD78-95 Read More

VIRUS - CYMBIDIUM MOSAIC: Insect Carriers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago No carrier of Cymbidium mosaic virus has been proven, but aphids and leaf hoppers, possibly scale insects and snails, are carriers of other virus. A66-55 Read More

BROWN ROT: In Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by the bacillus Erwinia cypripedii; starts as small chestnut brown spot on leaf; spreads to crown then to other leaves; spreads rapidly; plant can be saved by excision; soak for hours in Nat... Read More

BROWN SPOTS: Caused by the Bacteria Pseudomonas Cattleyae

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It affects phalaenopsis and others; control with Fermate, Benlate, then use Physan. Fi81-218 Read More

VIRUS - CYMBIDIUM MOSAIC: "0" Type of Cymbidium Mosaic Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On cattleyas it developed brown blotches on blooms days after they opened; see illus. of blotching in A70-310 for comparison; necrotic blotches are streak-like and more numerous at the base of sepa... Read More

VIRUS - CYMBIDIUM MOSAIC: Can it Be Spread by Leaf Contact?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is not spread by leaf contact but by insects and knives used to cut plants and flowers. A64-407 Read More

VIRUS IN PLANTS NAMED: In Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Descriptions of severe color break; mild flower break; symetrical flower break; blossom brown necrotic streak; leaf necrosis; severe leaf necrosis; cymbidium mosaic virus; cymbidium necrotic ring-s... Read More

VIRUS TRANSMISSION: By Insects

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Sap sucking insects such as aphids, leaf hoppers (vector of Cattleya Mosaic); slugs, snails, red spider are carriers. OD78-95There is no evidence of transmission of virus on plants left outdoors; m... Read More

VIRUS: Riboviren, a New Viruscide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A complex drug, very expensive to make, has freed cymbidiums from TMV in the lab. OA83-74 Read More

VIRUS - DETECTION, IDENTIFICATION, SYMPTOMS, TESTING: Other Plants Used as Detectors

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cassia occidentalis is an indicator of Cymbidium Mosaic Virus; Gomphrena globosa, for Tobacco Mosaic Virus. A67-287; A68-431 Read More