The biggest problem I had with beans last year was leaf roller caterpillars. They got out of control before I realized what the problem was. The solution was heavy spraying of B.T. I use the liquid concentrate which is easier for me to apply and seems to have more even distribution over the leaves. B.T. is totally organic control of several types of caterpillars and worms such as fruitworms.
As for the little bugs like flea beetles, insecticidal soap, neem oil or pyrethrin oil are solutions. Oils must not be applied in the heat of the day as they will burn the plants.
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