Development of the Problem:  The lesser cornstalk borer can cause extensive damage in summer nurseries and in fruit production fields.  Adult borers deposit single green or white eggs on strawberry leaves.  Larvae developing from these eggs bore into the crown of the strawberry plant at the soil line.  A silk tube is often formed between this hole and the soil.  During an active infestation, frass may be pushed to the outside of the plant.  Larvae usually leave the