Soil Nematodes & Predator Mites

Anybody in the Sacramento area use these things with success outdoors? Im reading that the majority of predator mites do best in temps between 75-85 degrees. We get heatwaves of 110 pretty normally around here.

Been spraying grandevo with success, & i know "if it aint broken, dont fix it", but if there is a more efficient method...then mine "might be broken!"...especially if i can dedicate that time elsewhere in the garden!

Last year i got hit by russets pretty bad, so i need to be sure to put something down to eat anything was dormant & waking up.

Thoughts?

I'm not looking forward to fighting russets again this year

Thats why im trying to get ahold of the problem before it starts! If all else fails im going to spray bleach...floramite..gasoline & damn near anything else thats highly toxic....hell i may look into a flamethrower...