Bean runner shoots

Asked July 28, 2020, 2:49 PM EDT

I live in Clackamas and just this year have had a problem with something eating my bean runners off of my poles. What would be eating these it is not slugs as there is no trails. I have been planting in this same area for years and have never had this happen before.

Clackamas County Oregon

3 Responses

Thank you for your question. Without a photo, I am going to speculate that you have cutworms, described here: https://www2.ipm.ucanr.edu/agriculture/dry-beans/Cutworms/ As you can trad, they overwinter in leaves and other foliage, which should be removed in the fall. You also might want to consider crop rotation, which keeps the same pests (insects and diseases) from feeding on the same crop year after year. Here is a short article on the topic, so you can out maneuver this insect next year: https://hort.extension.wisc.edu/articles/using-crop-rotation-home-vegetable-garden-0/ Good luck!

the only part eaten of my bean plants is the runner that curls around my pole and you think this is a cut worm? The leaves and beans are just fine.

As I indicated, without a photo of the insect, we have only the damage done as any identification mechanism. This would seem to be a chewing insect, since sucking insects leave different types of damage. Here is a list of insects known to be pests of beans: https://pnwhandbooks.org/insect/crop-pests?combine=bean I hope this is helpful.