Scaphoideus titanus, the natural vector of grapevine flavescence doree (FD), is widespread in New York. It was found closely associated with both wild Vitis riparia and cultivated V. vinifera, but it prefers V. riparia. Adult leafhoppers migrate from surrounding wild grapevines into the peripheral parts of vineyards. V. vinifera vines with symptoms of grapevine yellows (GY) disease were concentrated along the borders of vineyards. Even near GY-affected vineyards, V. riparia vines never exhibited symptoms of this disease. Symptoms of an MLO infection developed in 29% of Vicia faba plants fed on by field-collected S. titanus. However, potted V. vinifera «Chardonnay» on which the same leafhoppers were fed did not develop symptoms of GY within 1 yr (.)
No takes yet. Share an insight, caveat, or question.
A 1993 study studied this question.