Note 61 — Chapter XV · LETTERS TO MR. D. D. GIBB
Reading edition
132The attack is caused by the small black and yellow fly, figured above. She lays an egg on the barley sheath; the maggot from this attacks the ear, then eats a channel down one side of the stem to the first knot, and then turns to chrysalis state within the leaves.—(E. A. O.)