Date post: | 14-Jul-2015 |
Category: |
Science |
Upload: | blacken323 |
View: | 182 times |
Download: | 11 times |
ROLE OF WHITEFLY IN PLANT VIRUS TRANSMISSION
PRESENTED BY
P.MANIKANDAN
M.Sc(Agri)Entomology
Chaiman: Dr.R.KannanAssistant Professor in EntomologyAnnamalai university
Index
1.Taxonomy
2. Importance
3. Mechanism of transmission
4. Plant damage
5. Viruses transmitted
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
• Mostly circulative
• Semi persistent to persistent
• Females efficient in transmission
• LP-few hrs.
• Phloem
VIRUS-VECTOR RELATIONSHIP
•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
Whitefly species identification
species egg nymphs adult
T. vaporariorum
B. tabaci
8
Type of damage
Direct damage
Indirect damage
Virus transmission
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.
Cont…
Whitefly transmitting viruses
Geminivirus
(Begamovirus)
Crinivirus
Closterovirus
Geminivirus (Begamovirus)
Tomato yellow leaf curl virus (TYLCV)
Tomato torrado disease
Cotton leaf crumple virus
Cotton leaf curl virus
Chilly leaf curl virus
Mung bean yellow mosaic virus
Okra enation leaf curl virus
Pepper golden mosaic virus
Potato yellow mosaic virus
Sweet potato leaf curl virus
Squash leaf curl virus
Tomato yellow leaf curl virus
Cabbage leaf curl virus
Bhendi yellow vein mosaic virus
African cassava mosaic virus
Bean calico mosaic virus
Bean golden yellow mosaic virus
Crinivirus
Blackberry yellow vein-associated virus
Lettuce chlorosis virus
Cucurbit yellow stunting disorder virus
Cucumber yellows virus
Lettuce infectious yellows virus
Sweet potato chlorotic stunt virus
Tomato chlorosis virus
Tomato infectious chlorosis virus
Closterovirus
Citrus tristeza virus
Grapevine corky bark-associated virus
Little cherry virus 1
Grapevine leafroll-associated virus 1
Sugarcane mild mosaic virus
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