Thank you for this info Clark.
I’ll have to prune some shoots and and take a closer look
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If its verticillium, I’ll definitely take measures.
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Your welcome! No i dont think it is wilt but i do think there is something going on with the roots. Had a friend once that had wood ants hollow out his tree. He said he would have never found it had i not said inspect it closely. The only thing left was the outer cambium they ate the inside of the tree. He was inspecting around the roots and found out the tree was hollow. There was a hole i guess. See the root issue here as well Leaf curl on my new Bartlett Pear
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My European pears have some disease. Any of you know what’s wrong with them and the treatment please? Thank you in advance for all advices.
It looks like a rust. Myclobutanil spray may help. I had it once in my pear tree. I spray immunox every year to prevent it happens
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Vincent,
That is pear rust. Once the tree is affected, nothing much you can do. If you want to, you could spray it with fungicide like myclobutanil (one of the brand names is Immunox by Spectracide).
Next year, spray myclobutanil right after petal fall (after pear flowers dropped petals) once. If your area is quite rainy/wet, you can spray it again about 10-14 days later.
You should add sticker into the tank mix so the chemical stay on the leaves longer. Sticker like Bonide Turbo is easy to find and come in a small bottle.
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@mamuang @IL847 thank you both of you so much. Anyway I just bought copper spray for my little Peach trees next year. Do you think can I use copper on the pear trees as well instead buy some more spray?
Copper is not effective against rust. You need fungicide like myclobunatil or fenbuconazole.
Also, not sure what copper you bought. Be careful spraying copper when trees leaf out. Copper can cause leaf burn. Please check the label for the time and amount to use.
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@mamuang do you think if I spray chemicals for pear rust then have to repeat spray every single year? Below picture of my copper. Thank you Tipp.
That copper, copper octanoate, won’t help with pear rust.
You pear appears to be susceptible to pear rust. As long as you have host trees such as junipers around, it is likely you will have pear rust yearly.
It is not easy to remove all host trees but you can try. Here is the info on how pear rust occurs.
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I’ve got pear rust up here too. Cooler climate so not as bad.
In March I sprayed LS and oil at cracked bud for blister mite.
Looks like I’ll need a spray for rust, too.
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Hi Clark ,et al
I thought I would post an unusual pear happening here in my hobby orchard. I have been growing fruit for 40+ years and pears for that long. I now have over 150 varieties of pears (many multigrafted trees) and have never seen anything resembling this. So what are your thoughts?
I’m familiar with Apple mosaic virus causing leaf symptoms and have it on my Ashmead’s Kernal tree but this does not look like mosaic and only a low trunk sprout that grew this year is showing symptoms. The tree is a 20-year-old Shinko Asian pear grafted on P. calleryana with one limb grafted to Jilin. Jilin had fire blight strikes last year but is normal so far this year. No leaves on the rest of the tree are showing any changes.
My thoughts:
Bud sport to a variegated variety - I hope
Virus infection?
David
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Have actually seen this before with other things. Typically it is a nutrient deficiency or root death/ disturbance issue. It can be caused by excess water. Have you had a lot of moisture lately? Try to give it magnesium aka epsom salts, i bet it clears up in a couple of months. My thoughts are it is the onset of chlorosis. Like you i thought it might be a variegated it wasn’t in my case.
@mamuang my 2 different varieties on one Asian pear tree. One has rust really bad the other doesn’t.
The spray Myclobutanil is very expensive spray and if we have to spray every year. I would rather remove the trees and find some natural rust resistant varieties to plant. Don’t know which varieties yet. Thank you so much for your information. Below my Asian pear tree with and without rust effected on the same tree.
@cdamarjian is that on your Asian pear? I don’t know if I remove all effecting branches, would it help for next year? To protect some of my Asian pear and fragrance pear trees. I might remove rust effected trees away Christine.
It’s on a European pear. Depending on the year, I will get mild cases of it on my Euro pears, rarely Asian pears. Just checked my Shinseiki, Chojuro, Misharasu, and Kosui. Just a few dots. Doesn’t seem to affect fruit so I’m going to wait and see.
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Vincent,
Immunox is $13 a bottle at Home Depot. One bottle will last you several years. I don’t think it is expensive at all…
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Thank you Tipp. @mamuang
I don’t have any experience about chemicals.
Just researched on google and Amazon “Myclobutanil fungicide” it came out $155.
Can’t believe any fungicides treat different diseases problems. I will remove and do some chemicals treatment next year for my trees.
Another problem in the picture below. You see my Sweet treat 1/3 down all the leaves gone after blooming for the last 2 years. Then some young leaves come back very weak, looks not too healthy. Do you think should I spray the same chemicals for it also? Thank you for information.
Vincent,
I don’t know your area so those who live near you may be able to give you better answers.
I think your pluerry suffered from brown rot blossom blight.
Plum, Flowering-Brown Rot Blossom Blight | Pacific Northwest Pest Management Handbooks.
Growing stone fruit i.e. plum, pluots, pluerry, peaches, nectarines, cherries areas where it rains quite often, you will face with fungal and bacterial issues. It will show up after a few years of planting. No way to avoid it.
Immunox aka myclobutanil can treat pear rust. In the article, it also lists for brown rot blossom blight but it is not as effective as fenbuconazle (brand name Indar)but Indar is a lot more expensive per bottle.
If you do not want to spray fungicide, you should not grow stone fruit.
I would like to let you know that spraying chemicals is not as bad as some people think. You should wear protective clothing and follows the label.
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Thank you so much for recognizing what problem. When we knew it, will find out the treatment. I am verry happy with providing information. Thank again @mamuang Tipp