Neem spray controls pear and cherry slug
I have had great success in making up my own neem spray to use on my pear, cherry, plum and ornamental cherry trees.
I am a soap maker and therefore I have lots of soap shavings left over. I dissolve a handful in boiling water and let it cool to hand hot. I use a 1%-2% dilution of neem oil to water and add the soapy water. (Make sure you include the amount of water used to work out your dilution rate).
It works fantastic, slowly killing these pesky slugs over a period of 5-6 days. I read that spraying it on the ground beneath the trees also prevents these bugs from hatching. My infestation has reduced by 80% since I sprayed them for the first time last year. I love it. If you add a good handful of builder's lime it is even more effective.
I will try the neem spray without the lime to spray my cabbages for white butterfly this year. The good thing is that it only works on leaf eating bugs therefore good bugs are usually not affected.
By the way, you also need to spray any ornamental cherry blossoms and all plum trees as the slugs love these as well. I really hopes it will help to solve your problems with pear slug. :)