Squash vein yellowing virus
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Squash vein yellowing virus (SqVYV)
This plant virus infects curcurbits like watermelon, squash, or Cucumis species. Infected squash plants show vein yellowing. Infections of watermelon (Citrullus lanatus) initially result in mild vein yellowing with chlorotic lesions. These symptoms progress to systemic wilting, necrosis, and ultimately plant death. Fruits from infected plants are not marketable and have a necrotic skin, a different flesh colour and an increased acid content. The disease incidence can exceed 50% in some fields.
The disease on watermelons was first recorded in 2003 in Florida and was called watermelon vine decline. It was subsequently reported from other parts of North and Central America, as well as from the Mediterranean region. The virus is transmitted in a semipersistent mode by whiteflies like the silverleaf whitefly.
