Fleas and ticks question?

ok well i found out all 5 of my dogs were infested with fleas and ticks. i removed them from their bodies but my one question is how can i kill all the fleas and ticks in my backyard. ok well maybe not all, i think that would be a bit impossible. but is their a way i can neutralize the problem? is their a pesticide i can use specifically for fleas an ticks that is garden friendly that i can spray on the lawn, bushes, flowers e.t.c.? need some help plz thank u