The Tropical Fruit Forum

Temperate Fruit & Orchards => Temperate Fruit Discussion => Topic started by: 850FL on November 13, 2020, 05:53:52 PM

Title: Stonefruit Canker?
Post by: 850FL on November 13, 2020, 05:53:52 PM: What disease is this? I believe it might be some kind of bacterial canker but I can’t say for certain? Anyway it’s nasty.. looks like it infected just about every Japanese plum at Lowe’s.. can a plant survive this or will they all succumb? Also the Florida peach varieties seemed unaffected while every Japanese plum has it to some degree.. ?
(https://i.postimg.cc/mcBThc0m/EDAF9-F1-E-57-F9-4-E93-9489-4-DBE10613-B61.jpg) (https://postimg.cc/mcBThc0m)

(https://i.postimg.cc/1nYSWv4d/4306-EF8-B-EFAF-4467-9-CB1-30629-FA35-A44.jpg) (https://postimg.cc/1nYSWv4d)

(https://i.postimg.cc/jCwYxQDs/1-EA1-BA6-D-9-A83-4-C5-E-B931-57-C37-BECFA87.jpg) (https://postimg.cc/jCwYxQDs)

(https://i.postimg.cc/w1zCQC0v/C2760-E39-04-CA-4449-AB99-1619-D1-C95354.jpg) (https://postimg.cc/w1zCQC0v)

(https://i.postimg.cc/0zCLWVBC/E4-A981-B1-005-E-4-C4-A-9-ADD-6-F9-ADBABB40-E.jpg) (https://postimg.cc/0zCLWVBC)
Title: Re: Stonefruit Canker?
Post by: Jaboticaba45 on November 13, 2020, 07:30:33 PM: I have seen these at a lesser extent on some of my trees. They all survived, but look weird...
Title: Re: Stonefruit Canker?
Post by: Daintree on November 19, 2020, 09:43:57 AM: It looks like black knot disease. Like most fungal diseases, there is no cure, just mitigation.
A lot of trees can tolerate it with no harm, but I would not buy any tree that is already infected.
You may want to point it out to the nursery manager at Lowes. They should also notify the producer...

Cheers, Carolyn
Title: Re: Stonefruit Canker?
Post by: 850FL on November 20, 2020, 08:56:46 AM: Will it inhibit tree life or fruit production?? My friend actually bought 2 of those and I told him to return them right away!
Title: Re: Stonefruit Canker?
Post by: Daintree on November 21, 2020, 11:41:46 AM: Some varieties are fairly resistant, and will still produce but look ugly, like Jaboticaba45's trees. Some varieties will succumb rather quickly. Either way, no reason to buy a three legged horse...

Carolyn
Title: Re: Stonefruit Canker?
Post by: 850FL on November 22, 2020, 12:00:18 PM: Do you know which varieties are least and most resistant to this?
Also does it only affect Japanese plums, all plums, or all stonefruits?
Title: Re: Stonefruit Canker?
Post by: Daintree on November 23, 2020, 10:52:05 PM: Michigan State University has a good handout on it.
https://www.canr.msu.edu/news/your_plum_trees_versus_black_knot (https://www.canr.msu.edu/news/your_plum_trees_versus_black_knot)

Cheers,
Carolyn
Title: Re: Stonefruit Canker?
Post by: CoraMadelyn on February 01, 2021, 08:41:02 AM: Bacterial Canker caused in between nature infection and wooden tissue and it will reduce the growth of the plant.