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Tool Talk Discussion Forum

Math--mixing chemical

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ldj

03-14-2008 11:35:38




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I just can't get my brain in gear. I have a fire aunt killer bought at lawn&garden. It has .05% active ingredient. I have a little Acephate 90SP left over which has the same active ingredient as the lawn&garden fire aunt killer but it is .90% active ingredient. How would I mix this with a carrier (inactive ingredient)like flour or corn meal or what ever to end up with .05% active ingredient.
L.D.

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neblinc

03-18-2008 06:07:49




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 Re: Math--mixing chemical in reply to ldj, 03-14-2008 11:35:38  
I think LD missed the joke :wink:



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DiyDave

03-17-2008 16:56:07




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 Re: Math--mixing chemical in reply to ldj, 03-14-2008 11:35:38  
Yep the divide by 18 answer is right. Back when I was in school, and they taught us about applyin pesticides, the professor asked the question how do you convert 12 ounces into its metric equivalent, I was still talkin in the back of the room, no one else volunteered to take a stab at the answer, so he thought he'd make an example of me, asked me to come up to the front of the room, and show the class, as I had been talking in the back of the room. I walked up, wrote 12 oz = 355 ml on the board, walked back to my seat, and sat back down. He asked me how I did that conversion in my head so quick. I told him it was wrote on the side of every beer can I had ever drank! He stopped askin me questions, after that.

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Tim B from MA

03-15-2008 12:51:03




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 Re: Math--mixing chemical in reply to ldj, 03-14-2008 11:35:38  
I'd be careful about getting caught using that aunt killer. Plus, what's your uncle going to think?

(Sorry, though Stan and dr were grown up enough to resist, I just could not :)

Tim



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ldj

03-15-2008 16:01:11




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 Re: Math--mixing chemical in reply to Tim B from MA, 03-15-2008 12:51:03  
I know.. It's be darn if you do and be darn if you don't and as far as epa it is just be darn. I have saw people get written up and fined for the most absurd things. I had a little left over and I am using the max amount allowed by label. OH yes, I could have just put that extra in the mix--but if uncle new, he would get me for being off label. If I just throw it away!!! well you know, same if I flush it down the toilet UH even worse. If I put it in the corner to save till next year and uncle comes for an on site inspection he would probable say it wasn't stored properly.Well I dilute it to .05% and use it on my private yard and if Uncle don't like I would rather get a fine that way than any other.
L.D.

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ldj

03-15-2008 15:59:17




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 Re: Math--mixing chemical in reply to Tim B from MA, 03-15-2008 12:51:03  
I know.. It's be darn if you do and be darn if you don't and as far as epa it is just be darn. I have saw people get written up and fined for the most absurd things. I had a little left over and I am using the max amount allowed by label. OH yes, I could have just put that extra in the mix--but if uncle new, he would get me for being off label. If I just throw it away!!! well you know, same if I flush it down the toilet UH even worse. If I put it in the corner to save till next year and uncle comes for an on site inspection he would probable say it wasn't stored properly.Well I dilute it to .05% and use it on my private yard and if Uncle don't like I would rather get a fine that way than any other.
L.D.

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ldj

03-14-2008 14:24:44




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 Re: Math--mixing chemical in reply to ldj, 03-14-2008 11:35:38  
So would that mean I go a ratio of 1 part of my .90% insecticide to 18 parts of flour?
L.D.



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Stan in Oly, WA

03-14-2008 17:02:11




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 Re: Math--mixing chemical in reply to ldj, 03-14-2008 14:24:44  
Hi ldj,

17 parts flour to one part 0.90% insecticide, by volume.

All the best, Stan



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dr sportster

03-14-2008 12:24:28




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 Re: Math--mixing chemical in reply to ldj, 03-14-2008 11:35:38  
Think money.But anyway .05 goes into .9 18 times so Im thinking you need alot less.One eightenth of the ninty is the .05.



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dr sportster

03-14-2008 12:34:16




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 Re: Math--mixing chemical in reply to dr sportster, 03-14-2008 12:24:28  
I meant 1/18 not eithten. Eighteenth of .90.That math is very familar to me because its the formula for making a segment bend[large radius]in a pipe 18 5inch marks for 90 degree bend.



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