Grape fan leaf virus is transmitted by

Grape fan leaf virus is transmitted by Nematode.
Grapevine fanleaf virus (GFLV) is a plant pathogenic virus of the family Secoviridae. It infects grapevines, causing chlorosis of the leaves and lowering the fruit quality.
It is transmitted via a nematode vector, the Xiphinema index. This nematode acquires the virus by feeding on the roots of an infected plant and passes it on in the same manner.
The host for Grapevine fanleaf virus or GFLV is the Vitis species. This includes V. vinifera, V. rupestris and hybrids.