Role of whitefly in plant virus transmission by p.manikandan
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Transcript of Role of whitefly in plant virus transmission by p.manikandan
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ROLE OF WHITEFLY IN PLANT VIRUS TRANSMISSION
PRESENTED BY
P.MANIKANDAN
M.Sc(Agri)Entomology
Chaiman: Dr.R.KannanAssistant Professor in EntomologyAnnamalai university
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Index
1.Taxonomy
2. Importance
3. Mechanism of transmission
4. Plant damage
5. Viruses transmitted
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Taxonomy
• Kingdom:Animalia Phylum:Arthropoda
• Class:Insecta Order:Hemiptera
• Suborder:Sternorrhyncha
• Superfamily:Aleyrodoidea Family: Aleyrodidae
• Species: 1550 sp. worldwide, 3 are important
-114 viruses are transmitted by these 3 spp.
• Bemisia tabaci -111 viruses
• Trialeurodes vaporariorum -3 viruses
• Trialeurodes abutilonea -3 viruses
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• Mostly circulative
• Semi persistent to persistent
• Females efficient in transmission
• LP-few hrs.
• Phloem
VIRUS-VECTOR RELATIONSHIP
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•High economic losses
•Monophagus to Polyphagus
•All stage of host
•Fecundity: ~50 to 300+ offspring
•Very low spray threshold
•Insecticide resistance
•Plant virus transmission
ECONOMIC IMPORTANCE OF WHITEFLIES
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Whitefly species identification
species egg nymphs adult
T. vaporariorum
B. tabaci
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8
Type of damage
Direct damage
Indirect damage
Virus transmission
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Mechanism of transmission
9
Contaminated
diet transmission.
Diet contaminated
by the saliva of
viruliferous insects.
Sexual transmission
Male to female or
vice versa during
copulation.
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Cont…
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Whitefly transmitting viruses
Geminivirus
(Begamovirus)
Crinivirus
Closterovirus
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Geminivirus (Begamovirus)
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Tomato yellow leaf curl virus (TYLCV)
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Tomato torrado disease
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Cotton leaf crumple virus
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Cotton leaf curl virus
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Chilly leaf curl virus
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Mung bean yellow mosaic virus
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Okra enation leaf curl virus
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Pepper golden mosaic virus
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Potato yellow mosaic virus
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Sweet potato leaf curl virus
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Squash leaf curl virus
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Tomato yellow leaf curl virus
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Cabbage leaf curl virus
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Bhendi yellow vein mosaic virus
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African cassava mosaic virus
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Bean calico mosaic virus
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Bean golden yellow mosaic virus
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Crinivirus
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Blackberry yellow vein-associated virus
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Lettuce chlorosis virus
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Cucurbit yellow stunting disorder virus
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Cucumber yellows virus
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Lettuce infectious yellows virus
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Sweet potato chlorotic stunt virus
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Tomato chlorosis virus
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Tomato infectious chlorosis virus
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Closterovirus
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Citrus tristeza virus
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Grapevine corky bark-associated virus
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Little cherry virus 1
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Grapevine leafroll-associated virus 1
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Sugarcane mild mosaic virus
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Reference
• George N.agrios(2006)academic press,plantpathology p.p: 774-809
• Roger hull (2004) academic press, Mathews’Plant Virology p.p: 27-44
• http:/Whitefly,Wikipedia,the free encyclopedia.html
• Diseases of vegetable crops in Australia (edsPersley, Cooke & House 2010), available from CSIRO Publishing at www.publish.csiro.au
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