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Old 01-09-2019, 08:44 AM #3711
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Not sure if this has been posted already or not. Probably the best info out there.
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Old 01-09-2019, 08:50 AM #3712
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You must have a different type than what I have, because my root aphids are much more lively and cunning than any fungus gnat. Fungus gnats tend to be slow and lazy fliers.

*Looked em up and the rice root aphid is far different from my pest, and what many others seem to be dealing with. The ones I have are much more slender, quick, and seemingly even intelligent (scary little bastards they are).
Are you possibly mistaking fungus gnats for root aphids? It happens a lot, sorry if I am way off!
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Old 01-09-2019, 10:21 AM #3713
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Hi People my first post also,I have had success against FG's using powdered cinnamon,a nutural product.
A good covering of this applied on to the surface of the medium and a tablespoon full in warm water added to the drip tray and left for an hour will soak in and get the larvae in the bottom of the pot.
Sticky traps and a pc fan at pot level get the rest.
Since I have improved my watering regime I am no longer bothered with them,wet/dry is the key.
Thanks.
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Old 01-11-2019, 05:53 PM #3714
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I am dealing with rhopalosiphum rufiabdominale, rice root aphid!

I read a study about a citrus farm in Florida that had great success against rice root aphids using lecanicillium muscarium (formerly verticillium lecanii). It is an entomopathogenic fungi.

I have been using a combination of L. muscarium, B. bassiana and metarhizium. I water it into my organic soil every four days with 2ml per liter of molasses to provide a food source for the fungi.

The monitoring method I am using is to look for flyers and crawlers on the rim of the containers. If I spot any I then put fresh fan leaves out on the surface of the soil on top of the mulch layer. For some reason the crawlers gather in large numbers on the fan leaves over night.

I have been using these measures for 3 months now and have seen a drastic decrease in both flyers and crawlers. Going for total eradication. Will update in future!
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Old 01-16-2019, 01:53 PM #3715
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Quote:
Originally Posted by moses wellfleet View Post
Are you possibly mistaking fungus gnats for root aphids? It happens a lot, sorry if I am way off!
No these definitely aren't fungus gnats, I've never found those to be problematic. They're root aphids but I haven't been able to identify the exact species. They don't seem to be the rice root aphid.

Update on the Biowar effectiveness - I think it acts as an aprodisiac. Just joking of course but I am seeing an explosion of fliers at the moment. Upon inspection of culled male rootballs I'm not finding any crawlers though and not seeing evidence of root damage so maybe the combo of the biowar and predators is having some positive effect.

Nematodes and beneficial fungi up next I guess.
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Old 01-16-2019, 09:34 PM #3716
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Unfortunately L. Muscarium is not available in the USA it seems.

The rice root aphid is a huge problem in Asian rice paddies. Asian researchers came across L. Muscarium as a bio control for the rice root aphid!
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Old 01-27-2019, 10:51 PM #3717
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green lacewings anybody?
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Old 01-31-2019, 09:23 AM #3718
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green lacewings anybody?
I am interested in green lace wing larvae as a generalist predator that would munch any pests that wandered into my grow space!

In the case of root aphids I think they would prey on anything that came to the surface but they would not be able to control the hypogeal (subterranean) population?
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Old 02-07-2019, 11:28 AM #3719
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It's the lacewing larvae that feed on soil pests, but I'm not sure if they disperse through the substrate or tend to hang out in the top layer. That's the problem I'm having with my predator mites, they reproduce like crazy but like to stay in the top inch or two of soil.

One thing that kept me from wanting to try the lacewings is the fact that they form cocoons. I keep picturing having to pick cocoons out of flowers and that doesn't sound fun. Not sure if it would actually be an issue or not.
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