This seems to work really good,i had to wait and give them time but this what i did...7/27 i put in 5000 thrip predator mites and nematodes and again on 8/31..I have a 30'x48' greenhouse,this is its first year,it holds 28 plants plus veggies.So its crammed full this time of year.I noticed thrip trouble and scale trouble from the start..I put in some kind of wasp for the scale and they must of taken off because the scale is getting worse,but in controll...But the thrips are going away and i picked a couple leaf today where most of the thrip damage was and i could not find one thrip but i seen lots of little mites of all sizes eating away on eggs or some thing?The cost of the mites and nematodes are a little more then spray but they are lots easter to use,they do all the work...