Although this dreaded pest is not known to occur at any point in Iowa, it seems essential to bring it to the attention of all interested in fruit trees, forest and ornamental shrubs.
Early in the season we issued a press circular calling attention to the imminent danger of its introduction (if not indeed already present but unnoticed) especially since it has been found in very serious abundance in the adjacent states of Illinois and Missouri.
"The San Jose scale.,"
Bulletin: Vol. 3
, Article 6.
Available at: https://lib.dr.iastate.edu/bulletin/vol3/iss36/6