Hmmmmm..... I didn't see that with this batch, but the todes were added several days after application of BT and DE. Pretty sure the DE whacked them a bit.Compost mite population will explode with excessive nematode application.. Made that mistake once and was scraping them off the inside of my stored soil totes with a spatula.. I think i used potato halves to help knock them back, but eventually they ran out of dead nematodes, leveled out and are pretty much gone or at least back to normal levels where they wont decapitate seedlings before they sprout.