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Thread: Pest help needed, tried systemic insecticide.

  1. #33
    SirKristoff's Avatar
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    merit works really well, we used it on orchids back in florida, but it is damn expensive, upwards of 100$ for a small bottle of it. unless price has gone down, but DAMN does it work.

  2. #34
    Moderator Cindy's Avatar
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    These insects literally "ate" my two N. rafflesiana to the bones. I thought they were whiteflies and another grower also thought it was whiteflies. But they don't fly. The plants were isolated and put outside of my apartment. Organic insecticide didn't work 'cos the insects don't wash off after the spray so there must be some dead females with eggs around. Finally after 6 months, I gave up and the plants gave in.
    Cindy

  3. #35
    Hear the Call of Nepenthes carnivoure12's Avatar
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    My Grandma had that pest on her orchids, looks exactly the same. She cured them by using a damp paper towel and cleaning all the bugs off, she then sprayed the plant with this organic soap diluted in water sold in her villiage in Colombia. The plague of bugs was killed and seen no more. This also works by replacing the soap with insecticide. The plant must be cleaned thoroughly with the cloth first.

  4. #36
    Tony Paroubek's Avatar
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    If they are scale then they will be a challenge.. They are extreamly good at hiding in tight places that insecticide can't get too, including the roots. Once the young settle down and make the hard outside they are extreamly resistant to chemicals. Eggs are hiding under the hard shell and safe from chemicals.

    The only way to effectively kill them is with multiple treatments with a systemic insecticide or one that has a long residual effect that will kill the young as they emerge and are vulnerable to insecticide. Or a combination of both! It is also difficult to know for sure if you have won the war since the old dead insects remain.

    Personally I would wipe off as much as you can with towel and some alcohol. That way you will see more clearly if they are spreading again. Then treat with Orthene or some equally nasty systemic insecticide. You will need to follow the directions but something along the lines of retreating every 2 weeks for a total of at least 3 treatments would probably do the trick. For the first treatment I would simply unpot the plant remove all the potting mix and dunk and swish the plant vigorously in the solution.
    Is that a Nepenthes in your pocket or you just happy to see me?

  5. #37

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    Hi Everyone,
    We have had this pest invade our greenhouse, and we have eradicated it. We haven't seen them in a long time. We were informed by an Ag Agent that it is a type of tropical whitefly (there are many types of whitefly), and he recommended the treatment given by both Capslock and Philcula. The white dot thingies--looking like miniature tic-tacs, are the larval stage. they hatch from the eggs and make a hard casing for protection, as they happily suck the plant dry. A single reproductive cycle takes 10 to 15 days, depending on conditions, so the repeated treatment and systemic application of insecticides will be needed.
    Neem will not get rid of them, but works as a preventative. Orthene, Merit, and other systemics are excellent. Orthene stinks like rotten cabbage, Merit is almost odorless but more expensive. A good topical treatment is Talstar, which is a lot friendlier to things like reptiles, birds and mammals. However, Talstar is not systemic, and using it requires more diligence.
    Also, Vraev, you have two pests: brown scale and whitefly. Give both the same treatment as per Capslock and Philcula.
    These pests are tough, but controllable. We haven't had a case since, well, some plants came in from Hawaii. Not to fear, because this pest is here in Florida too, and anyone in south Florida growing Neps has already encountered them.
    Good luck and get started with the alcohol/water/soap treatment immediately!
    T&M
    Sunbelle

  6. #38
    Carnivorous plant enthusiast vraev's Avatar
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    thanks for the post guys. I am trying to see if I can buy orthenex online and give it a shot. I am hesitant as its inside an apartment and its too cold outside to take the plants and spray them there (-15 C). I should try talstar. BTW trent...thanks for the post...but I never saw a single fly anywhere. Those white things also are immobile. I noticed that now that I seperated the two plants infested by this.... the scale numbers went down in low humidity + a ethyl alcohol (kensington screen cleaner) treatment by using a ear swab over the leaves. I will get some rubbing alcohol later this week and try again and again and see if it can help somehow. I will also look up merit....but seriously the plants aren't even as expensive as the thing itself so i might shy away from it.

  7. #39
    Zero's Avatar
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    I think cindy is right about them not being whitefly. They don't fly or move at all.
    Strong systemic insecicide works with multible applications. Apply every 3-5 days for a month and they should be gone. Be carefull with the pesticide as it's very toxic to people. I use gloves and eye protection when spraying.
    SK-8 OR DIE

    growlist

  8. #40

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    The white dots are an encased larvae feeding on the plant. They do not move. the adult flies have a very short lifespan. They hatch and move to the potting media to "do the tango". After lurking there a while the females return to the leaves and lay eggs and thus the cycle starts again. This takes only ten days. This is why it spreads so fast. It is Whitefly, as ID'ed by the Florida Department of Agriculture.
    Vraev, if you don't use a systemic, you will be doing a lot of leaf wiping. It can be done, but requires really keeping an eye on the infected plants, and check all others near it. Cut the rubbing alcohol 50/50 with water to prevent leaf burn. Pure alcohol evaporates rapidly and can dissicate thin leaved species. Also, add a drop or two of liquid dish washing detergent. This cuts any water tension and the whitefly larvae hate it. Remember, you will need to defeat two or three cycles to get rid of them.
    Good luck!
    T&M
    Sunbelle

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