Thrips, Right?

Been having these come and go for weeks now. I've been trying to beat them back with neem oil treatments every so often, but they always resurface after a week or two and I always end up losing a plant as well. I'm not sure what it is about treating with neem, but I'll treat five to seven plants with an extremely low dose of neem and only one or two out of the bunch will get "burnt" and start dying, going brown, wilting up, and eventually dying. I figure it's not worth losing a plant every time I apply neem, so I am open for suggestions on how to deal with these. Spinosad?

Capt Jacks from home depot worked for me.

They are one of the easier pests to get rid of.

do you have a picture of your thrip?
at night they hang in warmer areas, up high. hang a piece of white plastic sheeting at one warmer end of your grow space and kill them in the morning.
spraying neem on leaves will do nothing to stop thrips btw.

chemphlegm said:

do you have a picture of your thrip?
at night they hang in warmer areas, up high. hang a piece of white plastic sheeting at one warmer end of your grow space and kill them in the morning.
spraying neem on leaves will do nothing to stop thrips btw.

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That is a thrip on the leaf They try and stay parallel to the leaf veins so to be harder to see.

Safer's End All (insecticidal soap with pyrethrin) works really good and the pyrethrin breaks down within a few days. Neem works well as a maintenance program, but not to completely kill them once they're established. Plus, if you're in canada you might have a hard time finding it.

Captain jacks or monterey garden insect spray is good for thrips.

Spinosad is the active ingredient

Spinosad. It just works. Simple and easy to use. Organic and non toxic.

Winning.

ZeroTrousers said:

That is a thrip on the leaf They try and stay parallel to the leaf veins so to be harder to see.

Safer's End All (insecticidal soap with pyrethrin) works really good and the pyrethrin breaks down within a few days. Neem works well as a maintenance program, but not to completely kill them once they're established. Plus, if you're in canada you might have a hard time finding it.

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see, thats why I never see them on leaves right

chemphlegm said:

see, thats why I never see them on leaves right

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The best bet to see em is to quickly spray your plants with pure water ( just a light mist, don't soak them) just after lights on. Gets the little bastards excited.

I sw the bigger ones a few years ago, they were on the bottom of one plant pot, and hanging out at lights on right be my c02 generator, easy kill and thankfully I havent see them since, now I know what to use if I do, thanks for the thread!

avid with a Surfactant, it will take 3 applications about 4 days apart. Do not use if you are budding. To me Thrips are worse then spider mites so I don't fuck around with them. Kill them all. Get rid of any flowering plants and spray your vegging plants. Clean your room and figure out what you are doing wrong, they got in somehow,so reveiw your air ins and outs , cracks , and gardening practices.
What do you wear when you go in the room? Shoe ? Did they come in on your hair?

It is such a big deal to me because I have a sealed room with co2 that runs warmer then a non co2 room thrips love it in there.
If you are moving alot of air though your room and are not using co2
then I guess you can use any of these hippy dippy remedies and just live with the thrips

Pyrethrin isn't exactly a 'hippy-dippy' remedy. Hit thrips with it and watch them seize and fall off the plant.

ZeroTrousers said:

Pyrethrin isn't exactly a 'hippy-dippy' remedy. Hit thrips with it and watch them seize and fall off the plant.

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Easy there moon beam

You can spray them with your rendered flowers if you like and it will work on most of them but what of the others

I bought 100mL of avid 4 years ago, I used 15 mL spraying a recipe of 3 sprays I have never see a thrip again, (till this morning, but it was a false alarm). I still have 85mL

how often have you had to respray?

Its all good what ever way you are most comfortable with
you do you bro

The problem with using Abamectin/Invermectin is that it is rather toxic and can persist in the environment for a few days to a few weeks if no UV is present to photo-degrade it.

As for pyrethrin, unless you get really unlucky and your pest population develops resistance, 4 spray sessions is usually enough to knock those pointy-assed bastards down and keep them down. In general 4 repetitions of the spray are needed, as it degrades fairly rapidly in the presence of O2 and does not persist as long as Abamectin (when no UV is present).

Good grow-room sanitation and processes keep thrips away, I made a stupid mistake and re-introduced them last grow (outdoor shoes might as well be a bug hotel). I sprayed with End-All II 3 times, never saw a thrip after the 2nd spray, but did two more anyways (again, not taking chances!).