Low D

I believe this is nitrogen poisoning with the mutated leaves really dark leaves and brittle stem and foxtailing. Can anyone confirm

Hello, long time member first time post. So I'm wanting to make some feminized seeds with a common colloidal silver method that I am familiar with. Here's my question. I've never used this method on autoflower. Is it the same process or are there any differences and after harvesting the pollen? can I then use that pollen on any strain of female plant to produce new strain of feminized seeds? Ty