Question
QUESTION: What are the side effects if I sprayed a pesticide too strong on the plants.  
Leaves have black, some have reddish spots and some have dried burn marks.
Thanks,
Paula

ANSWER: Hi Paula, it depends on the type of pesticide, some are stronger then others;reddish spots sound like a "fungus" so you may be shooting at the wrong target and the pesticide isn't responsible. Try a broadspectrum fungicide and see what develops, the burning is probably from the pesticide. Nick

---------- FOLLOW-UP ----------

QUESTION: ...and what should I use on them now?  I should be taken care of the way I take
care of my plants:)

Answer
I hear you Paula:) there is an old addage that for every minute you spend in the garden the good lord grants you 5 more minutes of life (I'll live until I'm 350 years old LOL). There is a product called "fungicide" another one called "organocide" try these; the burned parts of the plants should be pruned off, and then its up to mother nature to heal. good luck Paula and I'm here if you need more advice.Nick