Hi Gary, 

Due to the photo resolution, I cannot be certain of the species. But I can tell you that this is in the family Rhyparochromidae (Dirt-Colored Seed Bugs). As per the name, these insects feed exclusively seeds. Once seeds have sprouted, these insects do not feed on them. So I suspect that a different insect is responsible for the damage to your plants. Feel free to upload pictures of any other insects you suspect as causes of the damage. 

As a general preventative measure, I would remove any plant debris and weeds from the vicinity of your beans/peas/potatoes. This reduces harborages for pest insects. If they are more exposed, they are less likely to feed. It will also make it easier for you to observe/photograph them.