If it was designed correctly you should not have stripes. Do you have matched precipitation rates? Are you using water soluable fert? Liquid will not give you problems like the water soluable.
Thanks for the semper fi wetboots!
Matched PR means nothing here. DU is what you are looking for, and you will never get 100% DU in a sprinkler system .... EVER! Also, people that think that you can run fertilizer through your sprinkler system without having to perform maintenance to remove biological buildup are wrong.