The no pest strips are dangerous, they contain dichlorvos, Ã* choliesterase inhibitor which is released from the resin contained in the strip. Cholinesterase is an enzyme necessary to return your neurons to their resting state after activation. This means that 1-It does not affect plants, since they have no neurons, it may accumulate in the plant, but the stips does not need tu be used for long for the effects to be felt and 2-Getting a large dose of this will kill you, but you couldn't die from the strip unless you ate the resin and kept it down. I have my grow in my room so this strip isn't great. Spidermites are such bitches that I gave in and decided to get one, but I do not continuously leave it there. I use it to bomb my room, I'll seal it up and place the strip inside during the plants night cycle (I would suggest using it only very early in the plant life cycle so as not to accumulate the dichlorvos). It is advised against this on the packaging because the concentration of resin vapor will build up and when the room is opened, you should definately evacuate the air as quickly as possible and store the strip in an airtight case (or reseal the pouch it came in). The concentration build up during this short period should be enough to bomb the place, but keep the strip to reuse it if mites reappear. Use great care when using these strips as they are very close to being banned since they are so toxic, they actually use an organophosphate, which is what is used in nerve gas, and hopefully the plants will not have absorbed a large quantity and it will break down before harvest as smoking heavily dichlorvos inpregnated bud will most certainly be dangerous.