Hosta Virus X

Pest Management Fact Sheet #5064

Developed by Alicyn Smart, Assistant Extension Professor & Extension Plant Pathologist, University of Maine Cooperative Extension, and Nathan Andrews .
For information about UMaine Extension programs and resources, visit extension.umaine.edu.
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Introduction

Hosta virus X ( HVX ) is the most common viral disease to infect hostas in Maine. When this virus was first discovered in the mid-1990 ’ sulfur, it was encouraged to spread, as it created a identical alone count to the plants it infected. Varieties such as “ Leopard Frog, ” “ Blue Freckles, ” and “ Lunacy ” became very democratic for their concern leaf patterns and colors. HVX is a virus in the group known as “ potexviruses, ” including viruses such as potato virus X. These viruses spread primarily through transfer of establish fool. This most normally occurs through gardening, specifically when infect plant sap gets on tools that are used on uninfected plants. Insect feeding from insects such as thrips ( Thysonoptera ), beetles ( Coleoptera ) or caterpillars ( Lepidoptera ) can cause blackjack to spread via mandibles from infected to uninfected plants .

Host Plants

Hostas ( Hosta sp/spp. )

  • All varieties and cultivars are susceptible, with golden hosta varieties such as “Gold Standard”, “Golden Tiara” and “Regal Splendor” being especially susceptible

Symptoms and Signs

not all hostas will show initial symptoms of HVX. It is besides potential that some cultivars will not show any symptoms until the second gear year of emergence post-infection. The most common symptoms of this disease are a bleeding of discolor out from the veins of the leaves and blue or night green mottling on the leaves ( Figure 1 ). HVX can besides cause distortion in the leaves such as pucker and twist american samoa good as ring spots, flecks and slide fastener marks. Infected plants will besides have more stunt growth than that of healthy plants. occasionally, the leaves will develop necrotic lesions. Varieties that are highly susceptible will shed the infect leaves, culminating in the death of the plant .

Management

  • Carefully inspect any plants for color bleeding and leaf mottling before purchasing.
  • Before planting new plants, isolate from any other hostas for about 1 week to see if any symptoms develop.
  • Remove any and all plants that exhibit symptoms and either burn them or throw them away in their own trash bags. Do not compost.
  • Wash all tools and hands with soap and water for at least one minute before and after working with the plants. Normal sterilization with 70% rubbing alcohol will not be effective for HVX management.

References

Arcibal, Eric ( January 13, 2015 ). Hosta Virus X. Retrieved from Wisconsin Horticulture – Division of UW Extension : hypertext transfer protocol : //hort.extension.wisc.edu/articles/hosta-virus-x/
Smith, Sherrie, Gergerich, Rose and Jim Robbins. Hosta Virus X. Retrieved from the University of Arkansas – Division of Agriculture Extension : hypertext transfer protocol : //www.uaex.edu/publications/pdf/FSA-7548.pdf

WHEN USING PESTICIDES, ALWAYS FOLLOW LABEL DIRECTIONS!

Alicyn Smart, DPM
Plant Pathologist and Director of the Plant Disease Diagnostic Laboratory
University of Maine Cooperative Extension
information in this publication is provided strictly for educational purposes. No province is assumed for any problems associated with the use of products or services mentioned. No endorsement of products or companies is intended, nor is criticism of nameless products or companies implied.

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