Self Fertile Mulberry

Mulberry puts of fruit but doesn’t ripen. In many cases these deformed fruit develop.

Any ideas why?

Popcorn disease
When control is desired, a Bordeaux mixture (originated in France) of 4-4-50 is effective. For a small amount of mixture, the ingredients are: - 3 1/3 tablespoons of copper sulfate - 3 tablespoons of hydrated lime, mixed in one gallon of water.