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Thrips damage?

This is a discussion on Thrips damage? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Originally Posted by stateless A lot of good info here, if you use the neem ...

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  1. #11
    OrchidAddict's Avatar
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    Quote Originally Posted by stateless View Post
    A lot of good info here, if you use the neem let me know how it works, if you want to use a systemic in the angel trumpet tree, love those but they were outlawed in my town because people ate the flowers and died, i digress Bayer 3 in 1 is a good systemic, got rid of white fly.
    Wait, wait...people were EATING the flowers? And they didn't just stop when they figured out it was deadly? People are strange. My trumpet "tree" isn't really a tree yet...there's three different seedlings that I'm braiding together to get a tri-colored trumpet tree...I think it's going to be pink, yellow, and white...I don't really remember.

    But anyway, that tree seems to be the yummiest thing in my house. It gets attacked by everything. Whiteflies were enjoying it for a while shortly after I got it, and I treated it with a systemic. Then the whiteflies went away and I put it outside for the summer, and the caterpillars moved in and promptly ate it to a shriveled stump. I can't believe it even came back from that. Perhaps I'll just call it the salad bar tree.

    Anyway, I will try the Neem now that I have had a few more tips on how to use it properly. I'll let you know how it works. I'm absolutely fascinated by the fact that these buggers are eating some orchids but not others. They are munching my bastiannii but completely ignoring the equestris plants that are neighboring it. They haven't touched my pulcherrima plants but are making holes in my NOIDs. And there's been no chomping on any of my catts, dends, vandas, or paphs. Weird.

  2. #12
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    angel trumpets (datura) are hallucinogenic. i only know that coincidentally, as they are way too toxic to try.

  3. #13
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    Quote Originally Posted by coeruleo View Post
    angel trumpets (datura) are hallucinogenic. i only know that coincidentally, as they are way too toxic to try.
    Perhaps that's why the bugs love the plant so much!! Now I have this hysterical mental image of 'tripping' gnats...

  4. #14
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    A site with pictures of fungus gnats

    FUNGUS GNATS

    An idea for control

    Fungus Gnats

  5. #15
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    I had a problem with fungus gnats as well. Martha is right regarding how to control the fungus gnat population. You can also use mosquito dunks which are impregnated with Bacillus thuringiensis v. israelensis. The dunks float in the water and release the bacteria (BT). The dunks look like a donut in which you can tie a string through the middle and dangle it in your water container. Water your orchids with the BT water. The larvae ingest the bacteria which then interfers with their digestive system and they eventually starve and die. BT is not suppose to harm your orchids but will help with the fungus gnat population. It worked for me!

  6. #16
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    The two notches on opposite edges were caused at one and the same time, when the leaf was new and just starting to grow, and that point was just exposed outside the earlier leaf. So something nibbled the edge - the leaf at that time would have been young,tender, and packed full of hormoness - just waht a bug of some kind loves and needs. What it was depends on your ecology ; over here I would suspect what we call woodlice - I think you call them slaters ? or pillbugs ? (Armadillidium sp.) They come out at night, live under stones or under pots in slightly damp places.
    Agricultural pest experts won't take them seriously - everyone has them "they don't do any harm" they will tell you. The little b*****s will also nibble tender new root tips - leaving them characteristically jagged, whereas a slug or snail leaves them looking as though they had been sheared off cleanly. They will sometimes take slug bait - the little blue pellets ( but don't leave them on a leaf, they are toxic to plants too). If you can get a copper based fungicide ( can't get one in Europe - its illegal) spray the plant and the bench and the wall , at the dosage recommended for fungicidal use; this leaves a coating only a molecule or so thick, but they won't "walk" on copper - neither will slugs - it will keep them off until that coating breaks down , and if you manage to spray them too , it may kill them, although that hard shell they have must be a lot of protection.

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    I think I have slugs or snails, small chunks of leaves are missing. What do you folks use to kill these nasty guys?
    Thanks in advance.

  8. #18
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    Okay, so I have figured out that I DEFINITELY have a problem with fungus gnats. I have put up some yellow sticky-traps and they seem to be helping. I am preparing to get some tea tree oil to spray on my bark, because apparently the gnats can't stand the smell and it will keep them from nesting in the bark. But from what I've read, fungus gnats don't really cause leaf damage.

    Sooooo.....is there any chance this could have been caused by a "stink bug?" Aka "Halyomorpha halys" or "Brown Marmorated Sting Bug?" I found one wandering around in my greenhouse a couple of days ago. Could it have been living in there all this time, munching on my leaves?

    We tend to get stink bugs in the summer months...it's highly unusual to have one in the wintertime. It must have just set up camp in my greenhouse and used that as "base." (By the way, I HATE, HATE HAAAATE stink bugs. Ironically, I've never actually smelled the so-called 'stink' from one, because I don't smoosh them; I catch them with a tissue and flush them. But they creep me the heck out. I can't stand having to pick those things up. I get the creepy-crawly shivers just thinking about it. ICK!!)

    Does anyone know if the stink bug could have caused this leaf damage?

  9. #19
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    Stink bugs don't chew, they have a sharp probiscus with which they puncture or pierce the leaf and then suck the juices. I agree they are kind of creepy...

  10. #20
    Ron-NY is offline rothaholic
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    just found a stink bug, in the house. Must have come out of hibernation with the warm weather we had last week

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