if you dont want chemicals & insecticides in your bud go to the grocery store grab some cinnamon sticks & chamomile tea steep about 3-4 tea bags per liter of water & soak the cinnamon sticks in the tea for a few days.

I had them bad a major infestation in my gecko's vivariums & needed a harmless way to kill'em & this knocks'em dead.. I also add a bit of this mixture to my molasses water to keep them away..

Good Luck..!

Peace