National Geographic : 1911 Apr
year or two, been imported on nursery stock into a good many of our States and into the Province of Ontario, Can ada. Earnest effort has been made to stamp it out at these points of introduc tion, and it is hoped that this work has been successful. If this disease becomes established in this country it will result in enormous losses in our pine forests. Both of these diseases are examples of dangers which can be prevented only by an absolute quarantining of the infested foreign districts, so far as importations therefrom to this country of these par ticular products are concerned. In other words, these diseases are often not dis coverable by inspection, and cannot be destroyed by fumigation. The pine dis ease may be present in the pine for two or three years before giving any visible demonstration. The potato-tuber disease may be in imported potatoes and simi larly escape detection. EFFORTS TO SECURE LEGISLATION The necessity for a national quaran tine against foreign insect pests and plant diseases has long been recognized, and during the last 14 years, especially, a strong continued effort has been made to secure such legislation. This effort has been blocked very largely by a small body of importing nurserymen, who, careless of the consequences to the country at large, feared some slight check on free dom of their operations. The main body of nurserymen have interests identical with the fruit-growers and are in favor of protective legislation, and The Na tional Nurseryman, the principal organ of the nursery trade of this country, has taken positive stand in support of such legislation. The entire value of the imported nurs ery stock, as declared at customs, which is thus menacing the safety of this coun try is about $350,000 annually-scarcely more than the government is now appro priating to assist in the effort at the control of the gypsy moth alone in New England. Some of this imported stock is of ornamentals neither new nor peculiar, BROWN-TAIL MOTHS ON AN ELECTRIC- and is merely brought in because of LIGHT POLE THE MORNING cheaper production abroad. A large per FOLLOWING A FLIGHT* centage of it is seedling apple, pear, * These moths emerge early in July, are strong fliers, and have spread from the original point of infestation near Boston, northward and eastward, over much of New England. For tunately the prevailing winds are to the northeast during this season, and their spread to the south and west has been comparatively limited.