Dagger and needle nematodes

Author(s): Raski DJ

Abstract

Daggers are typically defined as short, pointed weapons. However, the daggers referred to in this article are nematodes, Xiphinema sp. These nematodes should be of concern to tree and small fruit producers because they are potential vectors of plant viruses known as nepo (nematode transmitted polyhedral-shaped) viruses. Nepoviruses commonly vectored by X. americanum (the most common species of dagger nematode in Michigan) affecting small and tree fruit are tomato ringspot virus, tobacco ringspot virus and peach rosette mosaic virus.

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