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Which is a virus vector (transmits) nematode?

Question: Which is a virus vector (transmits) nematode?

Options:

Heterodera avenae
Anguina tritici
Xiphinema index
Meloidogyne spp.

✅Explanation:
Xiphinema index is a species of dagger nematode known to transmit plant viruses, specifically the Grapevine fanleaf virus (GFLV). Dagger nematodes have long, needle-like stylets (mouthparts) they use to pierce plant cells and feed on their contents. During feeding, they can acquire virus particles from infected plants and transmit them to healthy plants.
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