. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. Elm Leaf Beetle 1. A leaf skeletonized by the grubs. Actual size. 3. Pupae, bottom and top views. Enlarged. 2. Grub. Enlarged. 4. Adult beetle. Enlarged. Control. The usual recommendation is to spray the trees with lead arsenate as soon as they reach full foliage. The spray should be directed to the under side of the leaves where the larvae feed. During very severe infestations it would be advisable to spray twice. The first application should be made when the leaves are about three-quarters grown while t
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. Elm Leaf Beetle 1. A leaf skeletonized by the grubs. Actual size. 3. Pupae, bottom and top views. Enlarged. 2. Grub. Enlarged. 4. Adult beetle. Enlarged. Control. The usual recommendation is to spray the trees with lead arsenate as soon as they reach full foliage. The spray should be directed to the under side of the leaves where the larvae feed. During very severe infestations it would be advisable to spray twice. The first application should be made when the leaves are about three-quarters grown while the overwintered adults are still feeding and laying their eggs. A second spray should be applied when the young. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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