Several crop scouts have inquired about soybean leaves with brown pockets or blisters often found along the edge of the leaflet. These blisters are the chambers created by soybean leafminer larvae. Only one larva occurs in each chamber, but I have seen leaflets with as many as three chambers and larvae. I have never seen any economic damage caused by the larvae but the adults do transmit bean pod mottle virus. The adult leafminer was featured in the June 17, 2002, Integrated Crop Management newsletter, page 102.
Iowa State University
Rice, Marlin E., "Leafminer injury common in soybean" (2002). Integrated Crop Management News. 1817.
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