"alan06" wrote in message
...

Put moss killer on and raked the lawn. It has left quite a few
straw/dead grass patches. Will this grass grow back or will I need to
do something else with them?

Carefully dig out the area that's bare. Mix what you have dug out with some
sharp sand 50-50 mix
Add a good quality of quality seed and put it back into the hole. Any left
over will do for sowing in other bare areas.
Water well, don't walk on it until the new shoots are well established.