Our pots of geraniums did not do well this year. So finally we decided to throw them away and on emptying the soil discovered the problem – chafer grubs. They are, as you can see, horrible looking things – fat and if you are a bird very succulent. In three large pots we discovered over 60 grubs. The grub of the chafer beetle survives by munching on roots of plants and grass. Chemical control is effective but we had only treated the soil once and obviously this wasn’t enough.