• Register  |
  • LoginLogin
Close
Login
 
 
Register
 Advanced search
  • Search
  • Register
  • Login
  • JOIN!
  • View unanswered posts
  • View active topics
  • Gardening
Gardening Forum   FRUIT FORUMS  FRUIT FORUM

Is this pear fire blight?




Post a new topic
Post a reply
14 posts • Page 1 of 1

Is this pear fire blight?

Mon May 08, 2017 1:04 pm

According to you, the dried side under these cuts could be pear fire blight?
We are talking about asian pears.
Attachments
IMG_20170315_142451_HDR_1494243690744.jpg
IMG_20170430_141318.jpg
IMG_20170506_165646_HDR_1494082784792.jpg
IMG_20170506_165803_HDR_1494082766186.jpg
hereistay
Full Member
 
Posts: 14
Joined: May 8 '17
Top

Re: Is this pear fire blight?

Mon May 08, 2017 3:31 pm

Fire Blight would normally be very quick in showing itself on pears by blossom wilting and shoot ends and leaves dying back, especially young delicate growth.
The older wood is usually showing damage later.
The marks around those cuts looks more like very light die back.
The dead twigs could be just some die back through canker etc.
Just watch the foliage....if there is Blight ..they will show it.
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Re: Is this pear fire blight?

Mon May 08, 2017 3:33 pm

I can't tell if that is fireblight, but very generally speaking, when you prune a pear tree, you don't want to see ANY brown-stained areas in the cut. If you do, sterilize the pruner blades -- I use alcohol in an atomizer spray, some people dip in 10%? chlorine bleach water. THEN cut several inches further down the same branch and check for any brown. Repeat, if necessary until you get to healthy, cream- colored cross-section with healthy green sub-bark layer.

Burn or securely bag and trash the affected branches.


...oooh Jona posted while I was composing my message... JONA, if you are still here, please check my content and point out if this is incorrect.
Learning never ends because we can share what we've learned. And in sharing our collective experiences, we gain deeper understanding of what we learned.
User avatar
applestar
Mod
 
Posts: 27218
Joined: May 1 '08
Location: Zone 6, NJ (3/M)4/E ~ 10/M
Top

Re: Is this pear fire blight?

Mon May 08, 2017 3:45 pm

Pruning advice spot on Applestar. Cant see the xylem on the cut but as you say , if it's brown stained then cut back until the staining disappears.
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Re: Is this pear fire blight?

Mon May 08, 2017 3:51 pm

Thank you for your replies!
Applestar I use to use bleach and fire at every cut I make but the first cuts were made by the nursery man with no cleaned tools.

Jona I don't see any damage on young leaves and new shoots, only this brown marks.
Anyway I cut twice the first plant the first time I noticed these marks and I saw little black/brown spots on the cross section of the wood.
I think because of these spots, the nursery man told it could be a fungal disease.
hereistay
Full Member
 
Posts: 14
Joined: May 8 '17
Top

Re: Is this pear fire blight?

Mon May 08, 2017 4:02 pm

That could be canker hereistay.
You don't say how big your tree is, but I guess not too large. So...can you look over the surface of the wood further down the tree...especially the trunk area and around the graft union. If you find any wound or damaged area , this could be the source. Canker can be systemic and move up through a tree to appear anywhere.
I hope I'm just being ultra cautious though.!
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Re: Is this pear fire blight?

Mon May 08, 2017 4:26 pm

I bought 3 young plants, 2 or 3 years from grafting.
A Hosui that I removed because too weak, a nijisseiki that I used as rootstock for niitaka (this one has no dieback or blackenings) and another nijisseiki.
On this one I noticed some damages and for caution I cut the damaged bark, put concentrated copper paste and mastic.
This plant showed again this mark on the top cut but seems to have stopped and seems to grow well.
Also around the treated bark there is no blackenings or brown marks.
The other pics are about a graft made with scions of the other nijisseiki (the one grafted with niitaka).
I cut once and put copper and mastic but after a couple of week this is the situation.
I knew that canker is a consequence of fungal disease or of fire blight,isn't it?
Anyway I give every 7 days bordeaux mixture against canker and fire blight and Tebuconazole after every heavy rain.
hereistay
Full Member
 
Posts: 14
Joined: May 8 '17
Top

Re: Is this pear fire blight?

Mon May 08, 2017 4:47 pm

Sounds like your doing all you can...so good luck with the trees.
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Re: Is this pear fire blight?

Tue May 09, 2017 9:15 am

I hope so Jona!
Anyway, today I noticed this blackening on the shoot of the graft with those marks, what can it be?
It is a confirmation that the brown marks under the cut are cankers?

Ps.: I read that it is possible to treat neonectria galligena by using carbendazim but this fungicide is forbidden in Italy (I think in whole EU). Another way is with high concentrated Tebuconazole and there is a mastic with Tebuconazole by a famous company. So I made a mixture with 10gr/lt if Tebuconazole with vinyl glue and put it on the marks.
Attachments
IMG_20170509_113908_1494326245425.jpg
IMG_20170509_103711_1494321182684.jpg
hereistay
Full Member
 
Posts: 14
Joined: May 8 '17
Top

Re: Is this pear fire blight?

Tue May 09, 2017 11:55 am

As you say..carbendazim has been withdrawn from the end of Jan this year. Old stock can be used until the end of September.
I do think that may well be canker and you are doing all you can.
The trouble is that canker can travel through the tree... always upwards....via the trees own feeding routes. That brown staining just below the bark level when a shoot is cut is a sure sign.
Keep at it though.. luck may be with you!
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Re: Is this pear fire blight?

Thu May 11, 2017 2:48 pm

I found other two pics of the first plant that the nursery sold me and than substituted.
This is what I ment with "brown spots on the cross section".
More and more convinced it is canker?
I don't really know if I have to eliminate immediately this plant to prevent contamination of other nearby asian pear plant or if I should wait to see what happens.
The plant is a Nijisseiki and had similar symptoms but the blackenning under the cut seems to have stopped.
When I first noticed the marks under the cut I cut away 3 points on its trunk that looked to be damaged, treated it with bordeaux mixture and covered with mastic.
The plant seems to grow weel unlike the Hosui that I definitely removed.
As soon as possible I'll post a pic of this plant.
Attachments
IMG_20170315_174425_1489596393990.jpg
IMG_20170315_142439_HDR_1489584778347.jpg
hereistay
Full Member
 
Posts: 14
Joined: May 8 '17
Top

Re: Is this pear fire blight?

Thu May 11, 2017 5:03 pm

Just keep an eye on the other trees, and as a precaution trim and paint any wounds that you see. That will stop any spore germination that could occur.
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Re: Is this pear fire blight?

Thu May 11, 2017 9:42 pm

This is the situation now.
Ad you can see there are strange brown marks on the bark.
Attachments
IMG_20170511_173507_1494538546390.jpg
IMG_20170511_173240_HDR_1494538637207.jpg
IMG_20170511_173314_HDR_1494538592515.jpg
IMG_20170511_173423_HDR_1494538569601.jpg
hereistay
Full Member
 
Posts: 14
Joined: May 8 '17
Top

Re: Is this pear fire blight?

Thu May 11, 2017 10:37 pm

I would still carry on with your tree ...all the time the leaf is healthy there is hope!
Pears are tough.
John
JONA
Mod
 
Posts: 794
Joined: Jul 25 '14
Location: Sussex. England
Top

Please Share. Thank you!

 
 
Top


Post a reply
14 posts • Page 1 of 1

 

 

  •   Similar Topics
    Replies
    Views
    Last post
  • Pollinating a Sugar (Seckel) Pear with an Asian Pear
    in FRUIT FORUM
    3
    669
    by applestar View the latest post
  • Mystery Pear Attachment(s)
    in FRUIT FORUM
    4
    613
    by !potatoes! View the latest post
  • Pruned pear tree Attachment(s)
    in FRUIT FORUM
    10
    990
    by Taiji View the latest post
  • Pear tree disease
    in FRUIT FORUM
    2
    596
    by Algida View the latest post
  • How much should I prune this pear tree? Attachment(s)
    in FRUIT FORUM
    14
    1076
    by catgrass View the latest post
  • Pear Seedling 2015
    in FRUIT FORUM
    37
    1545
    by applestar View the latest post
Return to FRUIT FORUM
  • Delete all board cookies • All times are UTC
Privacy Policy | Contact Us
Copyright HelpfulGardener.com 2003-2018 all rights reserved.
All trademarks and copyrights held by respective owners.



cron