Aphids...where do they go, what happens to them?

My Krauter plum was full of drippy aphids, this happens every year, doesnt seem to do any permanent harm to the tree, leaves look ok, but i just went out there, and they are all "gone". What happens to them, ??????
  10 answers
  • Becky H Becky H on Jul 26, 2012
    Or.........if they didn't fly off..............maybe some hungry ladybugs came along.

  • Bernice H Bernice H on Jul 27, 2012
    Thanks for the info. interesting. I never saw any wings or flying off. But I havent looked in a few days, , so do I understand they all develop wings and fly off, then lay more daughters? If i was to inject an aphid poison, (have injected) it would be best in October or in Feb or March? What if I do nothing? Am I contributing to the pest situation? Is there any long term damage to my tree? Anyway, I would not get another Krauter plum again, so many suckers from the base, I cant keep up with them, then this sticky mess ! @And Becky I would have needed an ARMY of lady bugs, I think I saw three out there! why? This was a banquet, so many aphids, so few lady bugs!

  • Lisa T Lisa T on Jul 27, 2012
    Wasps also eat aphids... found this out a few years ago when our Oak Tree was infested with them... Big mess that caused!!!

  • Douglas Hunt Douglas Hunt on Jul 27, 2012
    A number of beneficial insects feed on aphids. I generally don't favor anything stronger than a good insecticidal soap for their control because that is least damaging to the good ones.

  • Becky H Becky H on Jul 27, 2012
    Douglas, that's why, whenever I need something, I use a systemic. Beneficial insects do not succumb to systemics either.

  • Bernice H Bernice H on Jul 27, 2012
    Okey dokey...

  • Douglas Hunt Douglas Hunt on Jul 28, 2012
    Good point, Becky.

  • Gail B Gail B on Jul 29, 2012
    Some good replies here; I was just going to say that perhaps lady birds came, or parasitic wasps; there are all kinds of beneficial insects. If you didn't apply any type of pesticide/systematic -- DON'T. They all kill beneficials as well, and it sounds like you don't need it anyway.

  • Vicki Wall Vicki Wall on Jul 31, 2012
    I also understand aphids don't like marigolds, so if you plant some around your tree, it should keep them away.