Are these fat aphids?

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Are these fat aphids?

Postby Beano » October 12th, 2017, 9:13 am

It’s not a bonsai but my rose bushes are suddenly covered in these insects. Does anyone know what they are? I thought aphids but they’re a bit fat.

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Re: Are these fat aphids?

Postby Pearcy001 » October 12th, 2017, 10:13 am

Looking like aphids to me. I get fat black ones at my currently place.

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Re: Are these fat aphids?

Postby terryb » October 12th, 2017, 11:51 am

Hey Beano,

Not live aphids. These are the remains of aphids after they have been parasitised by braconid parasitoid wasps and are referred to as "aphid mummies". These wasps are natural predators and do a pretty good job at keeping aphid levels low if you don't spray insecticide. If you just use a jet of water to remove live adult aphids (which are black or green), the mummies stay put. They are also produced commercially http://www.goodbugs.org.au/Good%20bugs/aphidius.html and you can transfer the mummies to other plants with aphids, assuming the adult wasps haven't emerged.

[edit] The orange bug on the rose petal is a live aphid.

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Re: Are these fat aphids?

Postby Ryceman3 » October 12th, 2017, 12:24 pm

terryb wrote:Hey Beano,

Not live aphids. These are the remains of aphids after they have been parasitised by braconid parasitoid wasps and are referred to as "aphid mummies". These wasps are natural predators and do a pretty good job at keeping aphid levels low if you don't spray insecticide. If you just use a jet of water to remove live adult aphids (which are black or green), the mummies stay put. They are also produced commercially http://www.goodbugs.org.au/Good%20bugs/aphidius.html and you can transfer the mummies to other plants with aphids, assuming the adult wasps haven't emerged.

[edit] The orange bug on the rose petal is a live aphid.

terryb


Aphid Mummies....That is one of the coolest things I have heard in ages...! :cool:
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Re: Are these fat aphids?

Postby Beano » October 12th, 2017, 12:28 pm

OMG! That is actually really cool. I read about those while looking for pictures of fat aphids! They infect them with a bacteriophage which if I remember correctly from uni days actually changes their DNA so they die.

Aphid mummies! [FACE SCREAMING IN FEAR]


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Re: Are these fat aphids?

Postby terryb » October 12th, 2017, 2:09 pm

Beano wrote:OMG! That is actually really cool. I read about those while looking for pictures of fat aphids! They infect them with a bacteriophage which if I remember correctly from uni days actually changes their DNA so they die.


Yes parasitoids can do very cool things to their hosts. In this case, the aphid exoskeleton acts as the pupal case (the mummy) for development of the wasp larva after it has eaten the inside of the aphid. However, other substances injected into the aphid with the egg (including wasp symbiotic viruses) can change the hosts immune system as well as host behaviour, such as where on the plant the muumies occur.
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Re: Are these fat aphids?

Postby Keep Calm and Ramify » October 12th, 2017, 7:18 pm

Best to treat these early! - rare photo below captures the shocking results of "Fat Mummy Aphids" towards their final life cycle.
fat aphids.jpg
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Re: Are these fat aphids?

Postby Raging Bull » October 12th, 2017, 8:32 pm

That's just sooo funny Keep Calm!!! :lol: :lol: :lol: :lol: :lol: :lol: :lol:
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Re: Are these fat aphids?

Postby eyedia » October 12th, 2017, 10:54 pm

Its aphid...You can often get rid of aphids by wiping or spraying the leaves of the plant with a mild solution of water and a few drops of dish washing detergent. Stir together 1 quart of water, 1 tsp of liquid dish soap, and a pinch of cayenne pepper. Do not dilute before spraying on plants.
hope i helped...
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Re: Are these fat aphids?

Postby Beano » October 13th, 2017, 6:54 am

Keep Calm and Ramify wrote:Best to treat these early! - rare photo below captures the shocking results of "Fat Mummy Aphids" towards their final life cycle.
fat aphids.jpg


Did your kid make that? Is it your family?! I see name tags! Nice proboscuses!


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