I have this fig from Germaplasm UCD,since 2003,and it only got ripe a couple of fruits,in about 2007.
Otherwise it was very diseased with fig diseases,maybe one ,maybe more than one,not sure but it wanted to die a couple of times,then later on it grew up again in the middle of Summer,other times it will fruit then the disease overtake it and it will not ripe the fruits.
Knowing what superior fruits it can have i did not discard it,and left it in ground ,in a not so good spot,with half day sun.
Surprise it did not die last Winter,and started from soil line again.
I had it covered with a large plastic flower pot over Winter.
In the Spring ,the only thing i did to the tree,is I pulled out all suckers except three,very early.
Well this year the plant is very healthy,it has 18 fruits,on it and one got ripe today.
It seem that the Fig disease is all gone!.
I started thinking the cold might have killed, the virus at least for this year.
I was thinking about that possibility in the past,but,it is only an opinion.
Any way the fruit of Ischia Black look magnificent and it tasted magnificent.
And I have 17 more to ripe!
Here are pixies taken today
Edit Note:I also bought other Ischias from Gardenoway,Hirts garden,and they turned to be Celeste,figs.