7. • NEPO viruses: These are nematode transmitted
viruses with polyhedral particles.
• These are generally transmitted by species of
Xiphenema and Longidorus. Ex: Tobacco
• ringspot virus, Tomato ringspot virus, Tomato black
ring virus, Arabis mosaic virus
• NETU viruses: These are nematode transmitted
viruses with tubular particles. NETU
• viruses are transmitted by Trichodorus and
Paratrichodorous. Ex; Pea early browning
virus (Trichodorus sp.), Tobacco rattle virus
(Trichodorus pachydermis)
8. • Nematode transmitted viruses:
• Nematode vector Virus Virus group
• 1. Paratrichodorus sp. & Trichodorus sp.
Pea early browning, Tobacco rattle
:-NETU group
•
• 2. Xiphenema index
• Grapevine fan leaf :- NEPO virus
• 3. Xiphenema americanum
• Tomato ringspot :- NEPO virus
• 4. Longidorous elongatus
Raspberry ringspot :- NEPO virus
•
9. Dispersal by phanerogamic parasites:
• Phanerogamic parasites transmit the viruses
• by acting as a bridge between the diseased and
healthy plants. Ex: Dodder
• (Cuscuta California, C. campesris, C. subinclusa
etc.)
• Cuscuta subinclusa – Cucumber mosaic virus
• Cuscuta california – Tobacco mosaic virus
Tobacco rattle virus
Tomato spotted wilt virus
• Cuscuta campestris - Tomato bushy stunt virus