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24 Cards in this Set
- Front
- Back
- 3rd side (hint)
Symptoms of the PRSV |
Oily streaks on leaves Clearing along veins -flecks Mosaic and chlorosis Distortion,stunting Shoestring appearance -mite damage Profuse molting and puckering of specially young leaves |
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This PRSV isolate from -induces systemic necrosis |
Taiwan |
Asian country near China |
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Papaya varieties tolerant to PRSV have been developed where? |
Florida, Taiwan ,Hawaii |
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Prevention of PRSV through quarantine and geographical displacement of cropland has occurred where? |
Hawaii, Brazil, Phillipines |
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Prevention techniques for PRSV |
Disease free and clean seedlings Roughing Netting Non host crop (e - corn ) Cross protection Tolerant varieties Induction of mild stain |
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Vectors of PRSV |
Aphids (Aplus gossypii, Myzus persicae peach and melon aphid ) Seed transmission is rare |
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Which nutrient count of papaya decreases when the disease hits? |
Papain |
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In how many weeks of infection does symptoms show? |
2-3 weeks |
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Who named the disease ring spot? |
Jensen -1949 |
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Length of PRSV |
760-800nm |
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Genus and species of PRSV |
Potyvirus Potyviridae |
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History of PRSV |
1937-Hawaii islands 1950 -drop of 94% Origin -India (2250 years ago ) Not found in Africa Florida, Hawaii, Texas, Caribbean Islands, SA,southern China, BD,India, Thailand, Taiwan ,Phillipines -Severe |
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Amphitrichous |
Flagella found on both sides of bacteria |
Spirillum serpens |
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Atrichous |
No flagella in bacteria |
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Petritrichous |
Flagella surrounding the bacteria |
Salmonella sp. |
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Lophotrichous |
Duct of flagella found on one side |
Pseudomonas |
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Prion |
Infectious protein fibril |
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Virion |
Infectious virus particle |
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Lipovirus |
Virus with envelop |
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Ribovira |
When nucleic acid of virus is RNA |
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Viroids |
Infectious RNA in virus |
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Pilli |
Fibrous structure of the outside of some gram negative bacteria |
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Peplomere |
Unit of outer lipoprotein layer outside capsid of virus |
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What does Leeuwenhoek remind you of? |
Father of bacteriology Named bacteria animalcules In 1675 discovered bacteria |
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