can i control my diabetes naturally.

I have dignosied with diabetes since 6 months my fasting sugar level is about 140 and PP is about 150  I Wants to know wether i can control it naturally or i have to take medition.I am continuing exercises walking 30 minutes about 5 km Pt about 15 minutes and Pranayam about 15 minutes.please give me some tips how can control it naturally.

any exercise pl suggest.