. Dutch elm disease in Illinois . Fig. 10.—The Dutch elm dis- ease fungus is introduced into healthy elms through bark bee- tle feeding wounds made in the crotches of 1- and 2-year-old shoots. These wounds extend to the sapwood beneath the bark. Fig. 11.—The smaller European elm bark bee- tles make numerous small holes in the bark as they emerge. The holes resem- ble those made by small buckshot.

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