Black stuff on mulberry leaves

Gustavo Martins

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Finding this on some (older) leaves of my mulberry. Is this black spot? Something else? Tree is growing strong. General fungicide once a month and use of peroxide hydrogen when it rains.

image.jpeg
 

sorce

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Peroxide on the leaves?

On something that produces oxygen, I wonder if it's not too much oxygen?

Or too much fungicide.

Looks different than the larger black spots I associate with fungus...
But there are many fungi.

Sorce
 

Gustavo Martins

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Yes foliar spray with peroxide. Highly recommended by @0soyoung

Too much fungicide? Once per month?

Yes they are not spots. But from what I found black spot fungus does not always shows up as rounded spots...
 

Aeast

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That lools like mite damage to me, starts off yellow and then turns brown/black.
 

Gustavo Martins

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That lools like mite damage to me, starts off yellow and then turns brown/black.
Mine did not start yellow. I also do not see any webs, but I will give a better look when I get home
 

Gustavo Martins

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That lools like mite damage to me, starts off yellow and then turns brown/black.
Ok. Checked carefully and there are in deed red mites under some leaves. I do not have a miticide but I read online that sulphur is good and that I have. what do you guys recommend? Should I also remove the damaged leaves?
 

GGB

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I don't recommend messing with red mites, I have always had them on my trees with zero problems. Last year I nuked em cause .. what the hell. And right after that I had a massive outbreak of little spider mites (the white ones that kill trees inside of 2 weeks). Every mulberry I see is covered in black spots, that just comes with growing a weedy fruit tree. I have a rubra that I was keeping looking pretty good but I missed a few days of peroxide spray and that's all it took for it to be covered in little black dots. Personally I think I might be done messing with mulberry
 

Gustavo Martins

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I don't recommend messing with red mites, I have always had them on my trees with zero problems. Last year I nuked em cause .. what the hell. And right after that I had a massive outbreak of little spider mites (the white ones that kill trees inside of 2 weeks). Every mulberry I see is covered in black spots, that just comes with growing a weedy fruit tree. I have a rubra that I was keeping looking pretty good but I missed a few days of peroxide spray and that's all it took for it to be covered in little black dots. Personally I think I might be done messing with mulberry
you think peroxide also keeps mites away?

I jet washed mine this morning. Let's see what happens in the evening. I may try some neem oil as well... Oh well!
 

GGB

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Peroxide? not sure, they probably don't love it. BUT daily misting and watering onto the canopy keeps mites at bay. Dormant (mineral) oil worked for my mite problem. I applied once in fall, winter and one last time in spring when buds swelled and so far no mites. Don't know about using neem oil during the growing season. I have never done that so i have no advice there
 

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