Your leaf turning orange and curling is not because of thrips k. Your problem is very easy to resolve. I have seen this problem, in similar cases, fixed by readjusting your base line nuts. I would make sure u are not only mixing right but getting your ratio's of NPK correct; doing so, will allow other nuts to become more or less readily available. I would definitely start there.. BTW, the incectidice u spray will not cause you any problems at your plants maturity.. Thrips are usually not much of a problem just a fucking nuesence! Hang a fly stickty trap and that will fix it... Dont spray for Thrips..
Good luck,