Transcript Plum Pox Virus

Plum Pox Virus
Plum Pox Virus
Also Known as Sharka or PPV
A Devastating Viral Disease
of Stone Fruit, Ornamental Shrubs
and Trees from The Genus - Prunus
Peaches
Plums
Apricots
Nectarines
Sweet & Tart Cherries
Almonds
Confirmed Locations of PPV in the United States
Symptoms Vary According To The
Type 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.
PPV Presence in Leaves
Deformed Fruit & Stones
PPV Present In
Peach Blossoms
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
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
Transmission & Spread
• Short Distance Spread
Result of Aphid Transmission
• Several Aphid Species Can
Transmit PPV –
• Northeastern US
Concerned With
Black Bean Aphid
Spirea Aphid
Black Peach Aphid
Green Peach Aphid
• Long Distance Spread
By Movement of Infected
Plants or Plant Parts
How To Manage PPV
Natural or Chemical Application May Reduce Aphid Numbers
But Impossible To Entirely Control Aphid Population
Management of PPV
• 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
Tree Farms
Eradication
• Eradication Is The Most
Successful Treatment
• Timely Removal
Of Diseased Trees
Once A Tree Is Confirmed To
Be A Carrier Of PPV
It Must Be Eliminated
• Stumps Must Also
Treated
Be
Herbicides Used To Prevent
Re-growth - Sucker Shoots
Questions?