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Thrips 101: Introduction to Western Flower Thrips

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  • Guest's Avatar
    Guest replied
    Originally posted by DarthFader1 View Post
    My experience, just had an entire flower room get infested with thrips. I noticed the silvery specs on leaves and ID'd the thrips with my microscope early on in the infestation. Sprayed with neem, pyrethrum, used DE on the soil, all that stuff did was maybe slow them down some. Basically didn't do jack shit to get rid of them.

    Anyway im mid way through flower and i walk into my room 2 days ago much to my horror a couple of my girls have just been completely raped by these thrips. Im talking within 24 hours it went from leaf damage to full on leaf death. At this point i sprayed entire room down with spinosad, and im very glad i did it. I reckon if i had of left this any longer i would have lost entire room. Luckily the main damage is only a couple but the entire crop is undersize by like 20-30% i would guesstimate. The root damage caused by larvae has also pre yellowed a number of my plants just like what fungas gnats do. If your familiar with nitrogen levels in your soil and your getting early pre yellowing around day 35 then check your soil your going to see hundreds of these vile critters in there

    DO NOT let these thrips get hold of your room. Its like they build up slowly over a period of time and then POW, they just takeover. I'll post results of spinosad trreatment as they come to light but i know its working already seen dead thrips
    anything like this silver streaking ?spots ? DarthFader.

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  • DarthFader1
    replied
    Originally posted by inthefire View Post
    This things ever in the soil to?
    Yes, yes they are

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  • DarthFader1
    replied
    Another thing, does BTI work for thrip larvae does anyone know?? eg: soil drenching

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  • DarthFader1
    replied
    My experience, just had an entire flower room get infested with thrips. I noticed the silvery specs on leaves and ID'd the thrips with my microscope early on in the infestation. Sprayed with neem, pyrethrum, used DE on the soil, all that stuff did was maybe slow them down some. Basically didn't do jack shit to get rid of them.

    Anyway im mid way through flower and i walk into my room 2 days ago much to my horror a couple of my girls have just been completely raped by these thrips. Im talking within 24 hours it went from leaf damage to full on leaf death. At this point i sprayed entire room down with spinosad, and im very glad i did it. I reckon if i had of left this any longer i would have lost entire room. Luckily the main damage is only a couple but the entire crop is undersize by like 20-30% i would guesstimate. The root damage caused by larvae has also pre yellowed a number of my plants just like what fungas gnats do. If your familiar with nitrogen levels in your soil and your getting early pre yellowing around day 35 then check your soil your going to see hundreds of these vile critters in there

    DO NOT let these thrips get hold of your room. Its like they build up slowly over a period of time and then POW, they just takeover. I'll post results of spinosad trreatment as they come to light but i know its working already seen dead thrips
    Last edited by DarthFader1; 08-13-2014, 16:31.

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  • vegtable
    replied
    to be fair to jacks deadbug i do think there was less bugs the next morning.

    I resprayed with walmart houseplant spray with pyrethris spray from walmart and put silica sand on top of the soil today, lets hope these pests learn there not welcome here anymore!!!

    i even found bugs in my new unused soil bin, proably gonna toss it as i have a unopened bale of promix bx

    my plants seem ok i had been getting like 1/8 to 1/4 ounce of herb from my ppp plants, i cant wait to get a good pull again, i'm excited!! correcting my path.

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  • vegtable
    replied
    read this thread, thanks to all who shared experances, i just sprayed my flowering veging and clones with cap jacks dead bug, lets all hope they die quickly, i beat spider mites once before but it was a giant pain in the ass.

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  • Guest's Avatar
    Guest replied
    have not seen this product before, might be handy. top dressing.

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  • Gubar1
    replied
    ^^apps=spots

    the first post of this thread has pics that show perfect examples of what thrip damage looks like. here is a pic of there life cycle.

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  • Gubar1
    replied
    Originally posted by dumbask View Post
    Hi! Can somebody check pics of possible thrips damage? Posted here:

    https://www.icmag.com/ic/showpost.ph...2&postcount=12

    Thanks!

    Found possible egg, oval shaped, yellowish, very small. Also saw something that resembled more like a maggot, very small, yellow brownish?
    That looks nothing like thrip damage to me. Thrips leave brown spots all over the leaves from where they have suck the juices. They leave black apps all over the leaves as well as a clear "honeydew" substance. Not sure what that is but they do resemble my plants that have been light stressed. Are the lights close? This even happens to my young outdoors that I put in direct sunlight to soon.

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  • maryjaneismyfre
    replied
    Dumbask, it looks like it can be thrips..The larvae is the bugger that you will find in those growth tips. Hit it with garlic oil/spinosad combo and it'll nail whatever you have.. Unless it is those cyclamen/broad mite mofos but thats another story and I think you are fine..If it does not work, get the pests ID'd asap.

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  • Gubar1
    replied
    My plants looked wonderful but were growing slow for about 2 weeks or so maybe longer. I was super confused because they looked awesome but were very touchy and had that weird growth on the tips. I was spraying the garlic oil as a PM preventative about every other week. I guess it was keeping the thrips under control but they were still feasting on my plants. After the first attack against the thrips my plants are growing super fast. Exploding even. They had to get a little bit higher in numbers before I noticed the tell tell signs of thrips. Low temps and higher humidity are always good when trying to rid a grow of them although I would do this in veg.

    Identification is a huge part in pest control. You gotta have some sort of microscope to really look at the bastards and see not only what they are, but what stage of life they are in.

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  • maryjaneismyfre
    replied
    I find once a week spinosad is more than enough when there is a thrips outbreak. I have it in the wild and have had problems in the past, a preventative garlic oil and spinosad spray fortnightly during veg as well as bacillus added in a fortnightly AAC brew sprayed foliar feed during veg. eliminated/avoids the issue. Gubar has the fix. Just the garlic and spinosad will work and it IS systemic given in watering, I have taken note of the time of protection cover as you can see by the small hatched caterpillars and thrips larvae not being affected after week 3 to 4 of the spinosad watering but dying after first bite before, so water with a light spinosad once at start of flower and if need be a week or 2 at MAX after again (If short flower strain do not give after first week flower and long flower you can give again after 2 weeks into flower). Do not spray during flower unless you want mold. I go at the concentration given on the bottle for lawns, 5ml/ 10L whereby bottle is at a spinosad 120g/l stock concentration. Spinosad is broken down by light in the tissues of the plant so it works well systemically without being persistent IME. I have not studied it just keenly observed my plants.

    Hope this helps. Thrips is a bugger until you ID it, then you learn to see that F-up growth pattern and look under the leaf or in the growth tip and sure as hell the little bugger larvae is there. Hit it with spinosad and garlic preventative and you'll be ok. Bacillus and compost tea also helps and no need for big chems whatsoever. I grow for my own smoke and am very careful about what I use for pests.

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  • Gubar1
    replied
    Little bit of info about systemic use of spinosad on tomatoes

    http://www.ncbi.nlm.nih.gov/pubmed/16180075

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  • Gubar1
    replied
    I found some vegetable gardening forums that say Spinosad is systemic and can be injected into plants using a syringe. It will stay in the plant for up to 30 days. Some studies have shown that tomatoes will uptake it through the root system when added to the rock wool they grew in.

    I just started a battle with thrips. They all seem to be in the larvae stage still. I hit them with a powder mildew spray during lights on. It just a bunch of different oils and some garlic. I figured it suffocate them until lights went off and I could spray with Spinosad. So later that night when lights were off I drenched them top to bottom, including the top layer of soil, with Moneterey Insect Spray (spinosad). Its been almost three days I haven't found one under my microscope yet but Im still suspicious. Ill be hitting them again tonight with spinosad.I threw some mosqituito dunks in the soil as well.

    They plants sure don't look to happy today but they seem to be growing. I think it was the mildew spray? Its mostly the top leaves. Something about that spray and the light together is hard on young plants. I used the Safer brand Mildew Spray. It sure did suffocate those assholes though. I sprayed a leaf that had three on it and watched them all die in minutes under a microscope.

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  • inthefire
    replied
    This things ever in the soil to?

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