Need some advice on spider mites please..

hunter21312

Well-Known Member
So I have some young plants and it seems they have spider mites on them. They are fresh rooted clones that I'm putting straight into flowering. Now I have some other seedings and will spray I'm ready to sprout and replace them if I get feedback that I should do that instead of fight them all through out. what do yall think?
 

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VinnyOcean

Active Member
fresh soil usually does the trick make sure you wipe them all off and decontaminate any thing in the pot and start fresh
 

FennarioMike

Well-Known Member
Spray them thoroughly top side und underside of the leaves with something - I use a mix of neem oil, Azimax and blue Dawn. Also soak the soil surface. Do this at lights off and repeat every 3 days, 3 times over a 9 day span. The larva and eggs will hatch after your 1st and 2nd application - hopefully the 3rd gets the rest of the bastards.

Oh, and don't start them flowering until you get it fixed. Once in flower, you can't spray. Anything you put on them at that point will end up being smoked with the bud.
 

adower

Well-Known Member
If they're small plants dunk the entire thing in a azamax solution a few days apart. Make sure you get all the foliage.
 

hunter21312

Well-Known Member
Yeah iv already done away with those plants an go new seeds going. I will make sure I bleach everything and be sure to watch how I come into my grow room. Hopefully wont get them anymore. The clones wasn't far anyway and I brought them in from outside. Iv dealt with them before and had webs and shit I'm saying forget it!! Pisses me off because they were Sin Mint cookies but its ok I got cookie mother :) Il be vegging longer this time. I Just rushed this run cause I wanted to go ahead and start flowering..I do appreciate the feedback guys!
 

ZeroTrousers

Well-Known Member
Pyrethrin, insecticidal soap, neem oil, spinosad and diatomaceous earth . These are the tools of *safe* insect genocide.

For spider mites, mix up fresh pyrethrin/insecticidal soap following the directions on the bottle. Some products like Safer's 3-in-1 come pre-mixed with Neem oil, which is cool but not strictly necessary at this stage.

For spider mites/thrips/aphids/fungus gnats/etc you want to do one thorough spray every 3-5 days. For spider mites i'd suggest every 3 days. These little bastards breed fairly fast, so you want to hit the adults before they lay eggs, the life cycle can be as short as 5 days from egg to mature egg laying adult, so 3 day intervals ensures you get the adults and you get the larvae/immature specimens before they can breed. Eggs can take anywhere from 3-8 days to hatch on average.


By thorough I mean you take your plant out, hit it from 360 degrees making sure that you hit the bottom of the leaves, stem junctions and new growth tops, look for creases and crevasses that look like they might be an attractive place for bugs to hide. I prefer to use my off-hand to brush the fan leaves upwards while spraying for the first pass or two, then hit the plant from the top down to ensure that it gets thoroughly soaked - I also give a brief spray to the top of the soil/coco to give any little bastards hiding there a bad day.

If your plant is small enough, dunking them is a really good idea.

If you can take your plants out of the tent/room for an hour or two, give it as deep a clean as you can stand. 20:1 mix of water to bleach (don't linger in the bleach fumes...), wipe everything down and then follow it up once dried with a brief spray of your insecticide. Repeat this every other time you spray.

I'd suggest repeating your spray or dunk 4-5 times at the 3 day intervals.

As an aside: For thrips you can be a touch more spaced out because their lifecycle is a bit longer, but you have to be sure to stay on top of your soil spray This is also where diatomaceous earth is useful, as it seriously fucks up the thrip nymphs, fungus gnats and any other bug that has a stage of life cycle in dirt. Dont' breath diatomaceous earth if you can at all help it (wear a dust mask), simply lay it down with fans off and walk away till it settles. I personally don't use the stuff, because i find pyrethrin and insecticidal soap to work well.

Moving on... once you think the little bastards are gone for good, spray one more time. Don't question it - just do it. There's no such thing as overkill with Spider Mites, only "Open Fire" and "Time to Reload"

From now on, your goal is preventative maintenance. Keep your room/tent clean, prune dying/yellowing leaves, ensure none stay on the floor. Every week until the 2nd/3rd week of flower spray with a neem oil or horticultural oil spray mix (rosemary/mint/etc blend).

Once you have completed your grow - dispose of your dirt and pots safely (compost/recycle) and repeat your deep clean - twice. Pay special attention to corners, around vents/mesh and the intake/output ducts. Do not use compost that has previously been contaminated with mites/bugs/molds unless you pasteurize it first and can be sure you hit 70*F for at least an hour.
 
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