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Ants killing aphids and whitefly?!

I have 2 outdoor planters spending the winter indoors. They are planted with a large leaved ivy, impatiens and chartreuse sweet potato vine. I noticed a few weeks ago that the growing tips of the ivy were heavily infested with a brownish greyish aphid, while the sweet potato vine had whitefly. I cut off the ivy tips, and made a mental note to go find the insecticidal soap. I couldn't find it, and when I checked again, the aphids had repopulated.

But then a few days ago I saw small brown ants on all the affected areas, and the bodies of the aphids seemed to be dried up! The whitefly also seemed greatly reduced. I rubbed each area with a wet paper towel, and sure enough, just dead bodies, like dried husks.

Could this be? Are the ants killing these pests? I know ants often follow other insects to get the honeydew. But the fact is the ants are where the aphids and whitefly were, and those two seem reduced if not gone.

Comments (10)

  • 15 years ago

    and made a mental note to go find the insecticidal soap. I couldn't find it, and when I checked again, the aphids had repopulated.

    ===>>> that was either a really long search.. or some kind of super aphids ... lol ...

    i usually find aphids in the yard ... by first noticing the ants.. as you said.. its a symbiotic relationship wherein the ants 'milk' the aphids for honeydew .... i dont recall hearing they kill them .. but i wouldnt be surprised if there arent commando ants ....

    whitefly.. in the house.. i associate with soggy soil .. check out the link ... the problem is killing a number of generations .. and not allowing them to lay eggs in the swamp in between .... its really hard ... one must either rely on systemic chems ... [in the house????] ...

    or even better.. sterilize some new media.. and repot them ... and leave them out in the garage .. ONLY bringing them in.. if severe cold is forecast ...

    two ways to get rid of the eggs in the swamp ...

    you really are not contemplating 'coping' with ants.. IN THE HOUSE ... are you??? ===>>> get the pots out of the house ....

    ken

    Here is a link that might be useful: link

  • 15 years ago

    LOL! It was a search that was abandoned, and I did not seek out alternatives! I was wondering about something systemic.

    I will keep an eye on them. But they are definitely little desiccated bodies.

    In a month I can put the pots outside. They are huge, so repotting is not much of an option (while indoors). It's all I can do to lift them from their location at the dining room windows 8 feet to their summer home on the porch.

    The soil is not really soggy. If anything, they dry out too fast. As they are large and deep, the bottoms of the pots are filled with blocks of Styrofoam. So when the water runs into the saucer, it does not get drawn back up. Thus I try to water lightly, so I won't have standing water.

    I have ants every year in this house. Though usually they really start when it gets warm, then I put out ant traps and Terro liquid. Though that barely makes a dent, and they hang out near the exterior doors mostly. I've learned to live with them, just trying to keep them down. Every time my neighbor calls Orkin, they march over here.

  • 15 years ago

    i think what you are seeing as dead aphids could be the empty skins left after they have molted.

    Wiki has a good section on aphids and describes their relationship with ants.

    I would get the planters outside at the first possible opportunity. Indoors the aphids are coddled as they don't have to contend with rain, wind or predators. Just getting them outside can alleviate the problem. A good squirt from the hose will also dislodge and weaken many of them.

  • 15 years ago

    In a month I can put the pots outside.

    ====>>> i said the garage.. you have one??? .... you should be able to get them in a sheltered place .. pretty soon ...

    even during frost or freeze nights .. a closed shelter... garage.. barn.. shed ... can easily stay well above hurtful temps ...

    just make sure you shut the door.. while it is still warm out.. not at midnight ...

    ken

  • 15 years ago

    I was concerned that the garage would still get too cold, especially for the sweet potato vine. But no matter how cold the garage feels to me, I suppose it's still well above freezing temps.

    I can't haul them back and forth in and out of the house, too many steps to go down. So once in the garage they would stay there (in the dark) unless a sunny day turned up (rare).

  • 15 years ago

    just hang on for a week or so .. this weather has to break soon ...

    they will need to harden off to temps even in the garage .... and it has just been a miserably cold spring in my z5 ...

    what it boils down to .. is simply when you get fed up .. lol ... if you can stand them for a week or two.. leave them be..

    if every last nerve is frayed.. throw them in the garage.. and remember them in august.. lol ..

    ken

  • 15 years ago

    I would be sorely tempted to whack them all off down to a few inches of the soil...and let them start out fresh when the weather breaks and you can set them outside. All of them will grow back and the bulk of the bugs will go bye-bye with the nasty foliage.

  • 15 years ago

    Probably not dessicated bodies of aphids, but their shed skins. They cast them aside like dirty clothes left for the maid to pick up. IF, these dried 'husks' were fat and swollen, then they are what we call aphid mummies....the outer skins of the parasitized aphid. They are usually tan in color, while the shed skins are white.

  • 15 years ago

    I think you are right rhizo_1. See my post on Tuesday.

  • 15 years ago

    Didn't see that, Flora!

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