Here’s a link about timing the July application of grub control: 

https://blog.timesunion.com/gardening/lawn-grub-control-apply-in-july-when-the-beetles-fly/7370/

 Here’s a link about using the organic grub control Milky Spore; which is applied later in the season:

 https://blog.timesunion.com/gardening/killing-lawn-grubs-organically-starts-now/7382/

 Finally a link to a post all about Mole control: 

 https://blog.timesunion.com/gardening/holy-mole-y/7433/

 Short answer:  “Remember moles are solitary creatures and the young moles are kicked out of the burrow in late summer and they have to find someplace to set up a burrow before winter. If you apply MoleMax in early fall the young moles won’t set up house in your yard and you won’t have mole damage the following spring.”  So, mid-September or so.