Jump to content
The Corroboree
mcgrath111

Vectobac 12as - Larvicide to remove gnats

Recommended Posts

Hi All,

 

I purchased some Vectobac 12 as which is a form of baccilius thurgensis - israelensis, which is meant to remove gnats. I've followed application rates and even increased beyond the recommend application, yet still gnats!

 

Could it be  that the soil is too moist? (Always keep the pere's fairly wet)

Could it be the substrate? 

 

I thought vectobac would be my cure for gnats, not yet unfortunately :(

 

Thoughts and advice appreciated!

 

Thanks, 

Share this post


Link to post
Share on other sites

Have you tried diatomaceous earth?

  • Like 1

Share this post


Link to post
Share on other sites

I’ve learnt diatomaceous earth is one of the best control measures for pests in the garden. Also fly traps - mix a heaped table spoon of vegemite with boiling water (to dissolve) and a squirt of dishwashing liquid. And put in a fly trap. I found vegemite works better than the crap sold at bunnies. 
 

we had a bad fruit fly problem last year, so I put 6 traps through the yard and perimeter of the fence line. Took a while and constant changes of the vegemite mix (lasts around a 2-4 weeks) but got on top of it. Now the fly traps are always there. 

  • Like 1

Share this post


Link to post
Share on other sites

Too much organic matter not broken down enough be my guess... Using a "barky" mix? 

  • Like 1

Share this post


Link to post
Share on other sites

Yeah too organic matter / cheap soil mix. They seem to like the kleensorb diatomite which is bizzare lol

 

I've tried de and stick traps so far, guess I'll move onto vegemite (I'm saddened to say, I don't have any in the pantry.

 

Thanks All!

  • Like 1

Share this post


Link to post
Share on other sites

If your plant can take it.. Drown the pot and the fckn gnats.... Itll take a coupla dunks to murder a coupla generations. 

 

Ive changed media before to win wars with them. 

Share this post


Link to post
Share on other sites

Use a soil-wetter when dunking too. Eg a couple drops of detergent or a couple teaspoons of molasses. It helps the water stick to the larvae and drown them. Otherwise they can survive in little air pockets through out the mix.

Also I've read that crab-shell-meal works wel, as the bacteria that thrive on the ?Chitin? will eat the exoskeletons of the larvae. 

 

Sticky yellow traps can be made with cut-up plastic pots and vasoline. 

 

Let us know how it all goes :)

  • Like 1

Share this post


Link to post
Share on other sites

Oh, does organic matter cause gnats? I use sugarcane mulch in the veggie patch, would this cause them to breed more? The garden beds have wood chips. So maybe they are coming from the garden not the veggie patch. 

Share this post


Link to post
Share on other sites

Never had any luck with Vectobac, sorry. Dunno if stock was too old, wrong species or what.

 

 

 

 

Share this post


Link to post
Share on other sites
On 15/08/2021 at 4:31 PM, Darklight said:

Never had any luck with Vectobac, sorry. Dunno if stock was too old, wrong species or what.

Interesting to know, I've just contacted customer support - odd that it hasn't worked for another person. I wouldn't be surprised if old stock. I'll post an update to see what they say. 

 

 

 

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×