By Cantillon | This insect appears near the top of every list of annoying insects. It is very destructive and action should be taken if you come across it. The adult weevil does not do terminal damage to a plant. It may make notches in the leaves, but most plants can shrug it off. The damage is done by the hundreds of larvae that grow from their eggs. These larvae live on a diet of plant roots, and with a bad infestation, they can chew until your plant is severed at the ground. They also cause so much root trauma that when the plant explodes into growth in spring, it dies because it cannot take in the necessary water to support its leaves. |
Thank you! Those things have eaten so many of my heauchera. If I catch it early I can often save the plants just as you have. 
One thing I have tried with some success is to put lengths of old hosepipe around, about 6" long, especially on greenhouse shelving. The weevils hide in them during the daylight hours. Then all it takes is to check the traps and dispose of any you find. Thank you.
Great illustrations too!
