- Biperin 100EC contains the active ingredient Cypermethrin, which has the mechanism of contact, steaming, and eliminating stem borers, leaf rollers, rice thrips, fruit-boring maggots (stem borers causing fruit rot), measuring worms (stick worms). ), stink bugs and jumping bugs damage lychees, longans, custard apples, persimmons, oranges, tangerines, vegetables and fruit trees.