It's still early in the season so these aren't as "sick" looking as they will get (based on past years' experience). I'm attaching pics of the pears which are developing black spots now and then will develop cracks as they grow. They still taste good overall. Pics of bark now - I have noticed more wispy moss on them in the past and that may still develop. Is the tree diseased or is a soil issue or? Is it salvageable?
They were my dad's before so not mine to interfere but since they are now in my care, I want to fix this if I can.
I really don't know what kind of pear they are. They are more shaped like traditional pears than the Asian pears I have seen in the store but when I do a google image search for Asian pears, there are some that look like them.
Some apples and pears are simply prone to black spot, through a combination of genetics and climate. Conventional growers spray nasty fungicides to combat it, or give up and rip out the trees and replace them with something more resistant.
We've got some apples (esp Gala) that get hit with this and in wetter summers some of the pears get it as well. I try to keep the trees pruned to an open basket or vase shape to improve airflow, but I don't know if that really helps. I have also tried spraying with a horsetail infusion and with a solution of potassium bicarbonate. Both of these seemed to help and neither has any bad side effects that I can see. Might be worth trying them if you have access to them.
It looks like what happens sometimes if we get heavy rains usually a little before the fruit ripens. The fruit swells so quickly from the abundant water that they crack open.
I've noticed that it seems to happen in areas with poorer soils that dry out and then suddenly get huge amounts of water. I had some fruit do this in an area like that this year. In my areas with healthier soils that have lots of organic matter, that help keep a consistent moderate amount of water, I haven't seen it happen.
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Not sure if pears can be susceptible to scab but we have a few apple trees that suffer from scab and have some fruit that looks just like this. We've been able to manage with foliar sprays of nettle, burdock and fish emulsion.
Russell Apotheker wrote:Not sure if pears can be susceptible to scab but we have a few apple trees that suffer from scab and have some fruit that looks just like this. We've been able to manage with foliar sprays of nettle, burdock and fish emulsion.
Thanks, Russell. Do you make your own? Can you provide more details about how/when you apply?
Thanks, Steve. Your theory is definitely possible since we got a ton of rain at a weird time and the soil in that area needs some work. The tree that was most affected is also in more of a bowl than the other.
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