Hola gabo! I dont know anything about marihuana, and I dont like drugs of any kind, they are dangerous if misused... but you can keep the bugs away using Neem, Tobaco and Noni (dont know the name of the plant on english). Be carefull with the Noni and the neem, they are kind of agressive.
Depending on the bugs you want to keep away, you can even use the "borra del café".
I hope that its legal to have marihuana in the country you live, so you dont get in troubles.
Hola Miguel! Thank you so much, I have my garden so I will be using this tips for my other plants! I've been having a lot of issues lately with ants on my Basil plant, hope this works, upvoted and following you!
I use neem with an orange tree to free it of the ants. Look, for the ants you need to know where is the nest, so you can spray the entrance too.
It takes time, but it worked for me.
Again, cannabis is vastly different from fruits and vegetables and neem is not a safe option. Look up "Cannabinoid Hyperemesis Syndrome," and you'll find 90% of the cases are actually azadirachtin poisoning (aza is found in neem oil).
Neem is horrible for cannabis. Cannabis holds it inside the plant and keeps it from breaking down. All the "Safe" studies on neem were done with plants which do not do this. Stay away.
Clean cannabis doesn't have anything sprayed on it, or systemically in it during flowering. ;)