New Apple Disease Found In Canada

Apple Proliferation Phytoplasma

The USDA Animal and Plant Health Inspection Service (APHIS) has been notified by the Canadian Food Inspection Agency (CFIA) that they have detected apple proliferation phytoplasma (APP) in an apple orchard near Kentville, Nova Scotia. The affected orchard has been placed under quarantine. This is the first APP detection in North America.

The affected trees are Pacific Gala and were imported into Canada from the U.S. in 2008. It is important to note that no symptoms of APP have been observed in the source nurseries or reported in the U.S. at large, and the source of infestation is unknown at this time. APHIS has provided trace forward information to CFIA, and is currently conducting testing at the source nurseries. At this time, CFIA has not imposed new restrictions on importation of apple trees from the U.S.

APP, or ‘Ca. P. mali‘, is considered to be a quarantine pest in both Canada and the U.S. It is present throughout Europe, where it is considered to be one of the most critical diseases of apple trees. APP is spread through propagation practices with infected material including budding and grafting. Long-distance dispersal of APP occurs through the trade of infected rootstock, scionwood, or budwood. Specific insects, including certain psyllids, froghoppers, and leafhoppers, also spread APP, however it is not transmitted through seed or fruit or pruning.

Symptoms of APP include:
• Shoots around axillary buds, which create a broom-like appearance at the end of affected branches
• Leaf rosetting
• Enlarged leaf stipules
• Reduced growth and smaller, less sweet fruit.

For more information on APP, contact Craig Southwick at [email protected] or 970-494-7578.

Topics: , ,

Leave a Reply

Apples & Pears Stories
Apples & Pears
January 10, 2017
New Zealand Scientists Hope to Prevent Diabetes Through Apple Breeding
Apples are found to have a compound that reduces the risk of obesity, diabetes. Read More
Apples & Pears
January 5, 2017
Produce Veteran Tapped as New York Apple President
New president and CEO Cynthia Haskin has experience with Washington Apple Commission, takes over for Jim Allen. Read More
Apples & Pears
January 5, 2017
Traditional Varieties Still the Focus of Pome Plantings
Moneymakers — that’s what traditional apple varieties such as ‘Fuji,’ ‘Gala,’ and ‘Honeycrisp’ are often referred to in the industry. Read More
Apples & Pears
December 31, 2016
Association Seeks Proposals for Hard Cider Research Grant
Projects aim to elevate U.S. hard cider industry. Read More
Apples & Pears
December 29, 2016
Stark Bro’s Nurseries & Orchards Co. Celebrates 200th Anniversary
This growing season marked the 200th anniversary for Stark Bro’s Nurseries & Orchards Co. in Louisiana, MO. Stark Bro’s is Read More
Apple Grower of the Year
December 6, 2016
2014 Apple Grower Of The Year Bill Evans Dies
Legendary apple grower Bill Evans, who along with his wife, Jeannette, farmed more apple acreage than any grower in the Read More
Apples & Pears
December 3, 2016
It’s A Global Celebration For World Pear Day Today
USA Pears to host sampling events in 24 countries for 24 hours of continuous pear goodness. Read More
The Latest
Apples & Pears
January 16, 2017
Earl Brown & Sons Sold to Washington…
Foreman family purchases Oregon’s largest grower, packer of fresh apples. Read More
Apples & Pears
January 14, 2017
Washington State University Researchers …
A study by researchers at Washington State University offer cider apple harvesting and storage recommendations for growers. Travis Alexander, Jaqueline Read More
Apples & Pears
January 11, 2017
‘Arctic Golden’ Slices to hit Midwestern…
Ready-to-eat packs will be in test markets early this year. Read More
Apples & Pears
January 10, 2017
New Zealand Scientists Hope to Prevent D…
Apples are found to have a compound that reduces the risk of obesity, diabetes. Read More
Apples & Pears
January 5, 2017
Produce Veteran Tapped as New York Apple…
New president and CEO Cynthia Haskin has experience with Washington Apple Commission, takes over for Jim Allen. Read More
Apples & Pears
January 5, 2017
Traditional Varieties Still the Focus of…
Moneymakers — that’s what traditional apple varieties such as ‘Fuji,’ ‘Gala,’ and ‘Honeycrisp’ are often referred to in the industry. Read More
Apples & Pears
December 31, 2016
Association Seeks Proposals for Hard Cid…
Projects aim to elevate U.S. hard cider industry. Read More
Apples & Pears
December 29, 2016
Stark Bro’s Nurseries & Orchards Co.…
This growing season marked the 200th anniversary for Stark Bro’s Nurseries & Orchards Co. in Louisiana, MO. Stark Bro’s is Read More
Apple Grower of the Year
December 6, 2016
2014 Apple Grower Of The Year Bill Evans…
Legendary apple grower Bill Evans, who along with his wife, Jeannette, farmed more apple acreage than any grower in the Read More
Apples & Pears
December 3, 2016
It’s A Global Celebration For World Pear…
USA Pears to host sampling events in 24 countries for 24 hours of continuous pear goodness. Read More
Apples & Pears
December 2, 2016
New Director Of Consumer Health And Med…
Organization announces Korenna Wilson to take on the role of raising consumers’ awareness of apples benefits. Read More
Apples & Pears
November 28, 2016
Jim Allen Set To Retire — Adios, Mr. Big…
Jim Allen is stepping down at the end of the month as the longtime chief of the New York Apple Association. Read More
Apples & Pears
November 15, 2016
Researcher Gets To Bottom Of Fungus In F…
Team aims to develop tools to predict, detect microbes in stored apples and pears. Read More
Apples & Pears
November 10, 2016
U.S. Apples In Storage Up 11% Over A Yea…
Meanwhile, the nation’s dominant producer, Washington, revised its crop estimate upward. Read More
Apples & Pears
November 2, 2016
Video Highlights The Apple Breeding Proc…
Educational video illustrates how and why new varieties are developed. Read More
Apples & Pears
November 2, 2016
Market In Wisconsin Gets Confused For iP…
The Apple Store in Green Bay, WI, fields calls about technical support or new releases. Read More
Apples & Pears
November 2, 2016
Consider Alternatives To Finished Apple …
While tree availability has been a challenge, you may find other options give you a similar result. Read More
Apples & Pears
October 30, 2016
New Project Targets BMSB – Sustain…
Armed with a $3.7 million grant, North Carolina State University researchers have the brown marmorated stink bug, which has been found in 43 states, in their cross hairs. Read More