persistent viruses

Listing 1 - 10 from 14 for persistent viruses

Hyperomyza lactucae
... and transmit viruses to these plants. It is this feature that makes this pest economically significant on these crops. This aphid is a vector of about 12 non-persistent viruses such as lettuce mosaic virus, and several persistent viruses including lettuce necrotic yellows, papaya ringspot virus and sowthistle yellow ...
www.extento.hawaii.edu

Macrosiphum euphorbiae
... . Aphids vector plant viruses, and this activity potentially can result in greater losses than direct feeding damage. The potato aphid vectors over 40 non-persistent viruses and 5 persistent viruses. It is able ... E. Hiebert and J. Edwardson. 1984a. Watermelon Mosaic Virus 2. CMI/AAB Descriptions of Plant Viruses No. 293 (No. 63 revised). Purcifull, D., J. Edwardson, E. Hiebert, D. Gonsalves. 1984b. ...
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Viral Diseases
... Readings: Topics: 1. Factors affecting viral symptoms Host genotype Environmental factors 2. How do viruses induce diseases? Hypersensitive reactions Effect on chloroplasts a http://ag.arizona.edu/~zxiong/ ... diseases. http://www3.bc.sympatico.ca/me/patientsguide/eidpg.htm 51. Laboratory of Persistent Viral Diseases, National Institute of Allergy... Bruce W. Chesebro, M.D., Chief, telephone: (406 ...
members.fortunecity.com/smgantiry

Plant virology basics
... - Aphids - see also I- Nonpersistent (stylet borne - potyviruses, maize dwarf mosaic) II- Persistent (circulative - luteoviruses, barley yellow dwarf) B- Leafhoppers (Beet curly top) C- Whiteflies ... detectable in hemolymph) F- Virus acquired from phloem G- Viruses usually not mechanically transmissible 17- Variations on persistent transmission A- Circulative B- Propagative C- Transovarial passage E- ...
plantpath.unl.edu

On-Line Glossary: C
... of the virus by the vector for a long period, usually several days. (Also termed persistent transmission) cirrhus. (Also cirrus.) 1. A mass of spores in the form of a ribbon ... resulting growth. Usually on artificial medium. (15) culture collection. A repository of cultures of characterized viruses, bacteria, and other organisms. Used for reference and comparison with new isolates. (10) cupulate. Cup ...
ppathw3.cals.cornell.edu

On-Line Glossary: P
... 22) persistent transmission. See circulative transmission. (5) phage. A general term used for viruses isolated from prokaryotes including bacteria, blue-green algae (cyanobacteria) and mollicutes (phytoplasma and spiroplasma). The viruses ... (16) potexvirus. (Siglum of potato virus X.) Member of a group of plant viruses that infect a wide range of hosts, including monocots and dicots; individual ...
ppathw3.cals.cornell.edu More from this site

Lwoff's Pathways - Viral Replication
... forcing it to make new viruses. At some point bursting at the seams with the viruses, the host breaks open, releasing new pathogens into the environment. Other viruses operate differently: they enter ... open. Lwoff's definitive studies on the subject relied on the time-honored technique of persistent, careful observations. He observed the growth of single bacterial cells of Bacillus megaterium, a ...
web.mit.edu

APSnet Education Center - Plant Disease Lessons - Barley yellow dwarf
... for elucidation of the mechanisms of circulative (also called persistent) virus transmission by aphids. Like many plant diseases that are caused by viruses, barley yellow dwarf (BYD) is named for an ... who worked in California, proposed that a virus was causing these symptoms. Today, the viruses that cause BYD are classified in the family Luteoviridae under two different genera: Luteovirus ...
www.apsnet.org

web2-about the dahlia
... . However, by the end of June, surface feeder roots develop, and then hoeing must stop. Persistent weeds will then have to be removed by hand. Further weeding can be eliminated by ... and this will attract heavy infestations of aphids. A big danger is the spread of viruses brought in by aphids, and it is important to set up a regular spraying programme ...
www.dahlia-nds.co.uk

"Virus" in Roses
... on Rose Mosaic Virus. Dr. Manners has written: "Rose mosaic is a complex of several viruses which cause similar symptoms in rose plants. The most important of these in the United ... from the fields, and "start over." Heat Treating, however, is expensive. The cost, and the persistent tales of "relapsed" material, understandably hinder acceptance of the process. There is also the undeniable ...
www.goldcoastrose.org

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