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What is eating my green bean leaves? #567051

Asked June 04, 2019, 12:52 AM EDT

I am trying to find out what is eating my green bean leaves as they emerge from the ground. Some only have the stem and the split bean seed. The leaves are gone. I looked closely at several beans that still had their heads halfway in the ground and some of them had their leaves missing too. They hadn't completely emerged from the ground yet. What kind of insect is eating these and what can I do to stop it? Thank you!

Jackson County Oregon

Expert Response

There are a number of chewing insects that attack young vegetables. In your pictures, I did not see any slime from snails or slugs, so I am ruling that out. I suspect earwigs, which do damage to young plants this time of year. They appear at night, so you might go out after dark with a flashlight to check, or rake up debris in the garden to find them. (I see hiding places in your pictures.)

Certain oil-based baits are effective traps. Vegetable oil or fish oil placed in a small tuna-sized can sunk into the ground will be visited by earwigs. Add a bit of soy sauce. Keep the level of the oil at least an inch below the surface, forcing the earwigs to crawl deeply into the can and drown.

Spinosad is an organic control; it can be found in nursery centers. Look also for other baits that control a number of chewing insects, including earwigs. Follow all directions for use thorougly and be careful about attracting pets.

Thanks for using Ask an Expert.


An Ask Extension Expert Replied June 06, 2019, 4:12 PM EDT
I appreciate the information Sharon.  I'll give your suggestions a try.

Thank you,
Mary Perez
Eagle Point
The Question Asker Replied June 07, 2019, 5:15 PM EDT

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