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Pesticide application question

Discussion in 'Issues, Disease and Pests' started by Jon, Nov 2, 2009.

  1. Jon

    Jon Mmmm... bulbophyllum...

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    I just returned to Denver from Oregon. I left my greenhouse in the care of friends, and while they did a good job, pests have become prevalent. So, I need to spray curative doses of a couple of things to rid the GH of the bugs. More specifically: slugs, snails, centipedes, fungus gnats, white flies, and the little iridescent purple flies. Anyhow, I was thinking I would spray twice with my last container of Slug-It, Sevin, and Merit. My question is this: can I combine any of the chemicals into a single spray? The Slug-It requires a period where the GH will completely dry out (I usually go for 4 days without watering). Can I mix Merit and Sevin into that application? Will the plants suffer from the Merit and Sevin if they don't receive water for a few days afterward? Would I be safer applying Slug-It, waiting a few days, watering,. then applying Merit & Sevin? Or am I going to have to make three separate applications, one for each pesticide? I plan on using the stated rate on the bottle; I'm not going to just dump a bunch in a bucket or something.

    Thanks.
     
  2. Alexis

    Alexis New Member

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    Is slug-it a liquid, or are you making it into a liquid? Bush snails or regular snails? I'm asking becuase for regular snails and slugs, I've found pellets to be more effective.
     
  3. Alexis

    Alexis New Member

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  4. Jon

    Jon Mmmm... bulbophyllum...

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    Slug-It is a liquid. It's concentrated metaldehyde that I can pump through my sprinkler system. I've used it before, and it works incredibly well. Two applications, and there are no more slugs or snails. I don't have snails other than bush snails in my GH. I would recommend the stuff to anyone who has mollusc problems, except that it is no longer manufactured for some reason.

    And thanks for the Sevin label. I will probably use Sevin and Merit together unless someone tells me otherwise.

    Any other suggestions?
     
  5. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    You can use metaldehyde and Sevin together. Sevin is listed as a moluscacide. Both Sevin and Merit are Bayer products, so they should be able to tell you. OFE sells SlugFest by the gallon, a 25% metaldehyde product. Let us hear what you learn/decide.
     
  6. Jon

    Jon Mmmm... bulbophyllum...

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    Ok. Thanks Marni. I think I'll order some Slug Fest.

    I think I'm going to apply everything a few days apart. It's going to make the GH inaccessible for a bit, but that's ok. I'm receiving a new lense tomorrow, so I need to use that before I can apply anything that will coat the flowers with white residue. Canon 180mm L macro.
     
  7. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Jon, what is the rate of application you've been using with the Slug-It?
     
  8. Jon

    Jon Mmmm... bulbophyllum...

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    1:128. It's a 25% concentrate.
     
  9. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I'm confused. Does that mean you are using the concentrate undiluted at a 1::128 proportioner setting?
     
  10. Jon

    Jon Mmmm... bulbophyllum...

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    I put the concentrate through an injector that is set to 1:128 or 1 oz per gallon.
     
  11. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Thanks.
     
  12. Jon

    Jon Mmmm... bulbophyllum...

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    Welcome! :)
     
  13. sycrecub

    sycrecub Guest

    Sounds like it is a fungal infection. If the lesion is moist-wet, it is likely to be caused by phytophthora or pythium, but, if it is dry, likely culprit is fusarium. Stale, acidic or wet medium may be the cause of this fungal problem. If the infection is caused by fusarium, it is better to discard the plant as it is almost impossible to rid a plant of this fungus.
     
  14. Alexis

    Alexis New Member

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    :confused: What part of "pests have become prevalent" would lead you to believe it's a fungal problem? I don't believe Jon mentioned anything about finding lesions on his plants.
     
  15. Jon

    Jon Mmmm... bulbophyllum...

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    Spammer copy/pasted another post from in this section to get a link in a signature. It's been addressed.
     
  16. abaxter

    abaxter New Member

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    Jon, that sounds terribly complicated and risky. Can't you just drench with Orthene and
    kill everything at once? At least in my experience, 97% Orthene will kill everything but
    the orchids. Add a few yellow sticky things and you've got it made.
     
  17. Alexis

    Alexis New Member

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    That occured to me, but not being fluent in French, I wasn't able to decipher his links. Besides, I was feeling bitchy. :evil:
     
  18. Jon

    Jon Mmmm... bulbophyllum...

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    I'll give that a shot sometime, Angela. I started with the Slug It on Wednesday, and I've found dozens of bush snail carcasses so far. Woohoo!!!

    Alexis - :)
     
  19. This_guy_Bri

    This_guy_Bri weirdo

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    sorry about chiming in late....

    i'd recommend doing a couple different applications. i don't know if it matters if you do the one that needs to dry for several days or the other first but pesticides can cause phytotoxicity (damage) if things are under water stress....
    just my $0.015
     
  20. Jon

    Jon Mmmm... bulbophyllum...

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    Thanks This_guy_Bri. I appreciate the reply. That's an aaspect I hadn't considered. I know that Sevin and Merit can be sprayed together, so I will go ahead with that combined application.