. The cankerworms. Canker-worms; Fruit. THE CANKERWORMS 7 greatest distance to which they may be blown in this manner does not seem to have been demonstrated, but they are doubtless blown at least from tree to tree. (2) The larger larvae also suspend themselves by threads and some of them are often caught on passing vehicles and transported to new localities. (3) The egg masses, particularly of the fall species, which winters in this condition, are frequently car-. Fig. 1.—Distribution of the fall ried to uninfested territory on nursery stock. In 1911 egg masses of the fall canker
. The cankerworms. Canker-worms; Fruit. THE CANKERWORMS 7 greatest distance to which they may be blown in this manner does not seem to have been demonstrated, but they are doubtless blown at least from tree to tree. (2) The larger larvae also suspend themselves by threads and some of them are often caught on passing vehicles and transported to new localities. (3) The egg masses, particularly of the fall species, which winters in this condition, are frequently car-. Fig. 1.—Distribution of the fall ried to uninfested territory on nursery stock. In 1911 egg masses of the fall cankerworm were found in British Columbia on nursery stock imported from the United States (<%)• The clusters of eggs are easily overlooked, and doubtless many of them have been trans- ported to other localities where the cankerworm had been hitherto 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 Porter, B. A. (Bennet Allen), 1892-; Alden, Charles H. (Charles Harold), 1894-. Washington, D. C. : U. S. Dept. of Agriculture
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