Tick don’t generally hang out in the lawn so, if you mow it fairly low (3.5″) they shouldn’r be much concern there.  The DO position themselves higher up in shrubs and at the grassy/brushy areas at the edge of the yard.  We sell Eight in a hose end sprayer which is handy for this.  If your hoses wont reach the area, there is also a concentrate available for use in a tank sprayer   HERE’S a link to Eight so you can read the label…always follow the directions on the label.  Diatomaceous Earth will have limited effectiveness used in this way but is excellent if dusted on the bedding and directly into the fur of cats and dogs and will have no illeffect on them.  Nematodes don’t survive up in the taller grass and brush where the ticks are…they are in the soil…ticks are not.