Kinds of difusser
Single diffuser
A diffuser made of two tubes joined together: one holds the pheromone and the other is an aluminium wire that makes it easier to place.
Double diffuser
A diffuser made of two tubes, both filled with pheromone, joined at both ends and with small welds along them that can be separated. These diffusers are easy to place: on fruit trees, just separate the central welds and hang them on the branches; on vegetable crops they can be tied like a tie around the wires.

