Bean Weevil

Nematodes are often suggested, although I'm not sure whether they are available for pea and bean weevil.  I haven't previously heard of it attacking stems; are you sure that's what the pest is?

If your plants are not very tiny and just bite marks round the edges of the leaves they will be ok. I have one row of peas that have minimal damage, but one row that have been chopped to their death.

I think it depends how mature the plant is as to whether or not weevil munching will affect the main stem.   Some of my directly sown Sutton's Purple Podded were so badly affected they have had their chips.   I am going to sow some in pots and plant out at a later stage to fill the gaps.  I also wonder if different varieties are either more susceptible or resistant.  I am also growing Lord Leicester and treated these the same as the SPPs, but they have come through the attack with no need for replacements.