flies

Hello. I have a little problem with my plant. In 02 months has appeared some black dots on top of the leaves. I do not know how to avoid this fungus or removing it. I searched a solution and i found a article that said could be flies then I cover with a screen in the air input to prevent...

im a little concerned with the bottom leafs of this flowering girl but i know as they get more into flowering some leaves get yellow and you can pluck them off but I was just looking for peoples opinions/diagnosis Also ive found this little guy and squashed him when i slapped him and took a...