Greetings. 

Have observed the leaves of our kohlrabi being eaten. Upon examining the leaves top and underside, notice a small yellowish green caterpillar about 1/4 in in length. I do not see a high number of these caterpillars on the leaves. Actually very low. Can you please identify this caterpillar and, if it is the culprits, options for controlling it, both inorganic and organic remedies. 

Please see attached photos of the leaves and the caterpillar itself. Again, the caterpillar is roughly 1/4 of an inch long.