plum pox virus. also known as sharka or ppv a devastating viral disease of stone fruit, ornamental...
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Plum Pox VirusPlum Pox Virus
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Plum Pox Virus
Also Known as Sharka or PPV
A Devastating Viral Diseaseof Stone Fruit, Ornamental Shrubs and
Trees from The Genus - Prunus
Plum Pox Virus
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Peaches Plums
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Apricots Nectarines
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Sweet & Tart Cherries
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Almonds
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Confirmed Locations of PPV in the United States
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Symptoms Vary According To TheType and Severity of The Disease Strain
• Leaf Symptoms:– Vein Yellowing, Light Green or Yellow Rings, May
Show Crinkling, Puckering, Curling • Fruit Symptoms:– Ring Patterns, Blotches, Flesh Discoloration,
Misshaped, Deformed• Flower Symptoms:– Color Breaking or Streaking in Flowers of PPV Infected
Peach Blossoms.
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PPV Presence in Leaves
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Deformed Fruit & Stones
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PPV Present InPeach Blossoms
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PPV Virus• Symptoms May Not Show For 3 Years
• Disease Reduces Fruit Yield & Fruit Quality– Fruit Tastes Fine But Unappealing To The Eye
• Economic Impact To The Peach, Plum, Apricot Industry Worldwide - $600 Million Per Year
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PPV Virus• Six Strains of Virus
• Strain D - The Strain Found in North America
• This Strain Only Infects Peaches, Nectarines, Apricots, Plums,
• No Treatment - No Cure
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Transmission & Spread• Short Distance Spread
Result of Aphid Transmission
• Several Aphid Species Can Transmit PPV –
• Northeastern US Concerned With
Black Bean AphidSpirea AphidBlack Peach AphidGreen Peach Aphid
• Long Distance Spread By Movement of Infected
Plants or Plant Parts
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How To Manage PPV
Natural or Chemical Application May Reduce Aphid Numbers But Impossible To Entirely
Control Aphid Population
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• Exclusion – Growers & Nursery Propagators Purchase Only
Certified Virus Tested Plant Stock• Detection– Testing of Leaf Samples
• Resistance– Plant Resistance Using Genetic Engineering• Inserting PPV Gene Fragments Into Plum Trees
To Gain High Resistance to PPV
– In Early Experimental Stages
Management of PPV
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Tree Farms
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Eradication• Eradication Is The Most
Successful Treatment• Timely Removal
Of Diseased TreesOnce A Tree Is Confirmed To
Be A Carrier Of PPV It Must Be Eliminated
• Stumps Must Also Be Treated
Herbicides Used To Prevent Re-growth - Sucker Shoots
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Questions?