about life span analysis

Hi, is there anybody doing life span analysis on the wild worms?
I’ve been done this for about 2 months. Some problems emerged since I did this experiment and it seems that I haven’t found good method to solve these.
1 How to prevent the worms scrawling out the plates?
2 How to assure that the food is enough during the experiment?
3 Which time is appropriate to thansfer the worms?
Thank you