Herofan
It doesn't help it, but at the same time, oil and water doesn't mix. If you are using an oil based fly repellant, mixed with the diesel fuel it should be OK. It seems to make it heavier, but I think it is because it had some dry space where the rub had been depleted of oil. When it has been up a while, it probably needed recharging anyway.
I recharge mine just by looking at the cows. If the flies are coming back on them pretty good, I saturate it again. If I feel of it and it feels pretty dry I can pour it on. I pour it on slowly until it starts to drip, then I quit. No sense in wasting it. Then I seal up my can.
You can mix a water base fly repellant I have learned with diesel fuel if you add Xylene in the fuel. Make sure it is pure Xylene and doesn't have any other product mixed in with it. People use Xylene to clean out their tanks when they are running diesel as it will disperse or evenly distribute the water in the fuel. This can be used with Malathion or any fly repellant you want to use. In a diesel motor, it called for 3 oz. of Xylene per 10 gallons. It is actually to mix with paint to make it dry slower, or that is one of the uses. I got it on my hands and didn't wash it off as I walked to the pasture to see if it would start burning or do harm. But it just went away and I never saw a problem on my skin from it. If I couldn't tell where 100% concentrate ran down my hand an under my wrist, I figured the cows would be fine.
Now I can say it was tested on humans. Humans were not harmed during the testing of this product. :lol2:
This is the first time to try it, and I mixed a 2.5 gallon fuel container to pour on a 10 ft rub. I poured in 1.5 cups of 56% Malathion, 1 oz of Xylene, and filled up the rest of the way with diesel fuel to get the 2.5 gallons. Then I shook it real well. The soution stayed cloudy as I poured it on the rub. I will let you know how it goes.
Now I am concerned how water will do on this mixture! It sure smelled stout when I got finished with it.
Next, to try the suggestion that M. Magis told of putting a stitch of woven fishing line in the fly flaps to keep them from moving. I will do that tomorrow unless someone changes my plans.