Backyard Aquaponics
A place to discuss aquaponics

I need help , how to stop mosquitos from breeding in the system especially in the plants section due to flooding

Reduce the flood height

My fish eat all the mosquitos. And anything else that goes into the water.

At no time should the plant section of your AP see surface flooding....as C1 said.

I've used mosquito dunks in systems that were fishless for a time. So far my tilapia don't seem to mind the residues from the dunks.

I agree that your plant beds are probably too wet. Are they flood and drain or just constantly flooded? Many plants will suffer from wet feet, lowering the water level in the beds will not only help your plants but reduce the mosquito problem.

+1
Do you have a sump tank? Has it got a fly/mosquito screen cover? Do you have your FT screened off?
I have had mosquito larvae "migrating" either from the pond or from somewhere in the GB getting into the sump tank and mossies emerging from there

Check you water level in GBs and lower it if necessary .....eliminate any wet spots.

Screen on ST and sceen on FT

Should solve the problem

I use gambusia to keep the mozzies out ,they will eat anything that moves .When the trout eat them I just get some more out of the creek.Would you have some small fish like them in your area.
Cheers Don.

i recall in WA they recommend the native Western Pygmy perch

http://www.nativefish.asn.au/westernpygmyperch.html

Gambusia are easyer to get they are everywhere.

I would take advantage of them and feed minnows, which in turn feed your fish.