I think they are restricted where I live or they don't want me to get the right stuff to make more money lol. But I have been keeping a eye out for that stuffLooks like a Calcium or Magnesium deficiency going on. Diatomaceous earth won’t really do anything to them. You need Mosquito bits. You can make a tea and them also too dress with that. If you water once a week for four weeks in a row with that, they will be mostly gone.
I just try mange the best I can and keep them from getting into the pots ie: lady bugs, BTI, spinosad, yellow stocky traps, and DE seems to keep them at bay 

