This Agralan Leek Moth Trap refill is intended for use in Agralan  leek moth traps. 
Refill allows re -use of trap for one season.
It will  reduce  the leek moth from laying eggs  which causes maggot damage to leek crops.
Simply to use and comes with full instuctions.
Trapping season is from  April  to October.
Uses Pheromone which catches the  male moths which reduces female  egg laying.
Works for onions and  the onion family crop.