| After this, they enter the leaf midribs and eventually the stalk through which they tunnel, weakening the plant and reducing potential ear size. |
| Another pernicious pest affecting house plants is scale, which appears as small lumps that form colonies on stems, on the underside of leaves and along the midribs. |
| In autumn the yellow, channelled midribs turn red, and all the blades to purplish crimson, and this color stays a long time. |
| This variety, developed well before the 17th century, has no proper head but instead wide, spreading leaves with very thick midribs. |
| Not only the flowering heads but also the stems and the midribs of the main leaves were eaten. |
| The midribs are removed and the segments are rolled into round bundles, say by fives. |
