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Author Topic: What would make a good surfactant for an insecticide?  (Read 4611 times)

Offline isra

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hellow every body
could any one help me???
 i need a surfactant for water based insecticide :) :)
« Last Edit: 26/04/2015 11:39:32 by chris »


 

Offline Colin2B

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Re: surfactant
« Reply #1 on: 26/04/2015 09:43:57 »
hellow every body
could any one help me???
 i need a surfactant for water based insecticide :) :)
I usually use a drop or 2 of washing up liquid.
I often make my own insecticide from soapy water, which damages insect waterproofing, plus a little meths (methyl alcohol).
You can also use crushed rhubarb leaves but be careful how much as oxalic acid is poisonous.
 

Offline isra

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Re: What would make a good surfactant for an insecticide?
« Reply #2 on: 26/04/2015 12:50:01 »
how would u do that?
thanks alot
 

Offline alancalverd

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Re: What would make a good surfactant for an insecticide?
« Reply #3 on: 26/04/2015 17:16:08 »
Way back in the past I used to be a detergent chemist. As I recall we used pretty standard anionic surfactants like Teepol and Fairy Liquid to disperse all sorts of nasties like Aldrin, Dieldrin and DDT in hand sprays, and sometimes added alcohols to reduce the gel temperature for airborne spraying - alcohol also reduces foaming.

However the idea of using a cationic (soap) to damage the insect shell seems pretty clever. Try Lux flakes?
 

Offline Colin2B

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Re: What would make a good surfactant for an insecticide?
« Reply #4 on: 28/04/2015 17:29:14 »
However the idea of using a cationic (soap) to damage the insect shell seems pretty clever. Try Lux flakes?
Have tried soft soap, but usually lazy and use Fairy.
My original idea was to wash aphids and caterpillars off and they wouldn't be able to climb back. But I noticed some left on still died, reading up it looked as though it could damage the protective shell/wax, but it is possible it also affects the spiracles hence breathing.

how would u do that?
thanks alot

The oxalic spray is from book by Joy Larkham
1.4kg rhubarb leaves chopped
3.5L water
Boil 1.5hrs cool & strain
Mix 28g soapflakes in 1.2L water, mix all together
Spray

I use oxalic acid as a bee miticide and as a bleach for removing stains from wood. Take care as it is poisonous, wear gloves and mask (P2 should do) when spraying . Try coarse spray close up so as not to get lots of mist in the air. Use at own risk etc.
 

Offline isra

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Re: What would make a good surfactant for an insecticide?
« Reply #5 on: 04/05/2015 06:00:06 »
i tried it its realy good
thanks very much
 

Offline Colin2B

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Re: What would make a good surfactant for an insecticide?
« Reply #6 on: 04/05/2015 06:47:44 »
i tried it its realy good
thanks very much
Glad to help
 

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Re: What would make a good surfactant for an insecticide?
« Reply #6 on: 04/05/2015 06:47:44 »

 

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