Originally Posted by coldcanna
I think an important thing that pot growers overlook that is a common term in mainstream horticulture is "allowable threshold". Spraying neem every three days during a battle, and once a week as maintenance will kill 99% of your problem, switch to something like hot pepper or nicotine spray late in flower. There might be one or 2 banging around on some lower leaves but this will in no way effect final product in an substantial way. Laughing at people who throw away whole crops or drop hundreds on avid. If you feel things are so bad that you need heavy artillery, hot shot strips are 10 bucks and knock those fuckers out quick
Yes, you can have spidermites and they wont affect your plants or yield that much.
It's only when the population explodes for some reason that they can kill your plants.
Defoliating during flower can keep their numbers down, as they are mainly on the fan leaves, and if you are pulling off the fan leaves that have lots of eggs and mites on them then it can help to prevent an epidemic happening.
But best to spray in veg, maybe twice, once when they are small and then just before putting into flower.
The downside in not eradicating them completely is they can build up a resistance to the chemical you are using to get rid of them.
And then you might find that chemical does not have much effect on them in the future.
Apparently in the US there is a strain of spidermite that has evolved to feed on cannabis specifically, and has a resistance to chemicals used get rid of them.
Apparently they are hard to get rid of.
I use Yates Mavrik, contains Tau-Fluvalinate, seems to work ok.