Category: Ailments

VIRUS - DETECTION, IDENTIFICATION, SYMPTOMS, TESTING: Spots and Their Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Usually light-colored at first, they become elongated lengthwise, then somewhat depressed, later they darken, become necrotic and more depressed; one form on cattleyas produces a ring formation. A7... Read More

VIRUS - DETECTION, IDENTIFICATION, SYMPTOMS, TESTING: Testing by Commercial Laboratory

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Send a leaf or leaves with some visible symptoms, even the expert relies on them; the lower portion of maturing leaves can be sent to Florida West Coast Scientific Labs., address given above on thi... Read More

VIRUS IN PLANTS NAMED: In Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The signs vary; sometimes the whitish spots and streaks are elongated, sometimes relatively broad and whitish; Ref. A76-206. Please omit. Insofar as determined they are free of virus. OWD Read More

VIRUS TRANSMISSION: Virus Transmission by Seed-pod

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Virus disease can be transmitted by green-pod culture although the seed can be removed from the pod uncontaminated; the seeds are virus-free. A75-680 Read More

VIRUS: Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago 1.discard infected plants, 2. sterilize cutting instruments, 3. sterilize pots, 4. keep moisture from dropping on pots below and do not let roots from plants intertwine, 5.sterilize benches before ... Read More

VIRUS: Modes of Transmission

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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: Control of Hand Transmission

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use cheap plastic gloves; or wash the hands thoroughly with soap and water after each handling of a plant or materials. A83-600 Read More

VIRUS IN PLANTS NAMED: Odontoglossum Ring-spot Virus

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Characteristics = it is limited mainly to Onc. (Rossioglossum) grande; causes leaf symptoms first as necrotic spots, enlarging to form necrotic rings; leaves turn yellow, drop prematurely; no flowe... Read More

WETTING AGENTS: Tectronic 1508

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Its nature; tests with over 200 plants, preparation and applications for volume use; refer to A82-507 Read More

VIRUS: Problems with Stud Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Disease is transmitted to the seed through the pollen except in the case of Phalaenopsis, if the seed is removed carefully from the virused pod; virused plants always pose a threat to the virus-fre... Read More