Organic spray for fruit trees?

Paradox

I seem to remember hearing several years ago about an organic spray for fruit trees. I think it might have been clay based, and it stuck to the fruit and kept the bugs out? Anyone happen to know what I'm taking about? If not, what do you recommend for keeping bugs outta ya pears?

bmaverick

In a hand pump sprayer, mix in 50% neem oil to 50% filtered water and a tad of natural dish soap. This has worked for us on peach, apricot, and apple trees.