In Piensa en Verde you have Cordelene de Trabe, an insecticide to protect your marijuana plants that acts against caterpillars, larvae and worms.
This biological insecticide is applied via foliar, its liquid composition makes it penetrate effectively in the leaves and helps the immune system of plants.
Cordalene is composed mainly of Bacillus Thurgiensis of the variety Kustraki, in only two applications prepare to finish with caterpillars, prays and also procesionaria as they die quickly by ingestion.
It is always better to prevent than to cure so it is preferable to apply Cordalene before the possible attack of insects, observation will also help us in the task, if you see excrement in leaves or buds, alert!
Butterflies sometimes deposit their eggs in the plants, in the case of marijuana in their leaves and flowers, although if they have not yet hatched or only there are larvae the problem can be easily remedied.
Of course it is always more complicated to eliminate the worms already grown in the flowering phase.
They like to live inside the buds and eat them, sometimes when we harvest we find the surprise of empty flowers and rotten inside. That's why I recommend Cordalene and avoid problems with pests.