I understand with using a long term biological white grub control like Milky Spore it takes awhile. Milky Spore manufactures explain this very well, but being impatient it pains me to see my grass dying. I purchased another bag, and I'm spreading more Milky Spore, soon I will have years and years of protection from the White Grub. Now if I could keep the neighbors cat our of my yard! ;)