I did try something similar yesterday, but normally I don't measure anything. :)
I filled a spray bottle with water, added some oil, dish liquid soap and shook it.
When I sprayed the red lily beetle, it did die, but not as quickly.
I will check tomorrow to see if it also killed the larva.
At the moment I am between houses, so I can only check on my science experiments every couple of days. :)
I would really like to get rid of the red lily beetles without hurting anything else.
I don't even want to hurt the red lily beetles, but they show me no mercy. :)
I will keep adjusting this recipe until I find the one that works for me.
If you use it and find a happy medium recipe, please share with me. :)
July 6, 2013:
Today most of my lilies are in bloom! Checked for red lily beetles
and I didn't find any.
I think the combination of moving my lilies to a sunnier location and being consistent with hand picking of the larva and the beetles; worked for me.
The spray concoction works, but it's just as easy to hand pick them and drop them in soapy water. I like wearing garden gloves for this job. :)
Good luck with yours!
The Red lily beetles are back with a vengeance.
They must be attracted to the lily smell, because the red beetles are not picking on anything else.
If it's the smell that they are attracted to, I'm going to spray my lilies with a garlic or onion spray. Let you know if that works.
June 30, 2016 - garlic spray
Well - the red lily beetles are gone.
So far this works better than anything I've tried for the last couple of years.
I didn't have fresh garlic so, I used garlic powder.
1/4 cup of garlic powder one litre of water.
I let the mixture sit in the sun for a couple of days
and then I just poured the garlic solution in a squirt bottle.
I squirted the whole plant including the soil around the plant and under the leaves.
The left-over garlic residue - I poured more water over it and let it sit in the sun again. Just in case I needed to re-apply the garlic spray.
For a squirt bottle; I just used an empty dishwashing liquid soap bottle, salad dressing bottles etc. would also work. That way I didn't have to strain or filter the mixture before using it. For easy pouring in the squirt bottle; I poured the mixture in a measuring cup with a spout and then in the squirt bottle.
This is a month later and I can't find any red lily beetles around. I was getting ready to re-spray my lilies after it rained and I didn't need to.
If you would rather use fresh garlic - just use a whole head of garlic - break apart the cloves.
Smash the garlic with the side of a large knife blade. Don't need to peel the garlic for this.
In a jar pour a litre of water and the mashed garlic and let it sit for a day or two.
The stronger the garlic infusion, the better it works. Strain the solution, pour in a spray bottle and just spray away.
Hope it works for you as well!
other Non-commercial Pest Sprays .PDF