Virus and Virus-like Diseases

Multiple viruses reduce pear tree vigor and production, sometimes causing fruit malformation like stony pit or leaf symptoms. Different viruses may be confused or occur together. Use virus-tested clones for nursery stock. Remove infected mature trees. Viruses spread only through affected scion wood, not by insects, making prevention the best strategy.

Use clones that have been tested and found free of all known viruses to produce nursery stock and to top-work virus-free trees. Remove infected trees.