THE POTATO-TUBER MOTH. 3 
Aside from numerous similar complaints, including the usual num- 
ber from California for the past two years, this species has been 
received from Eagle Lake and Hallettsville, Tex.; San Jose, Costa 
Rica; Seattle, Auburn, and Yakima, Wash.; New York City, where 
it has not become acclimatized so far as known; Fort Collins, Colo.; 
and Larimore, N. Dak. These records include only occurrences on 
potato. 
In the case of the last report the tuber moth was stated to have 
been imported into southern California in potatoes from China. It is 
doubtful if the species has been established in North Dakota, but 
inquiries have been made in regard to the danger of its being intro- 
duced there as well as into Minne- 
sota and many other States. 
REMEDIES. 
The potato-tuber moth is a 
difficult insect to control by any 
single method. It 13 not possi- 
ble to reach the tuber worms in 
their mines in the potatoes or 
in the stalks or tubers while 
erowing in the’ field, which 
makes it necessary to proceed 
against the pest by other meth- 
ods. Of these, several must be 
employed to insure success. 
CLEAN METHODS OF CULTIVATION. 
The first measure consists in 
the maintenance of clean meth- 
ods of cultivation. This im- 
plies that all infested potato 
plants and solanaceous weeds, F'* a cs eae atonement Pe 
such as ground cherry, bull net- 
tles, horse nettles, and volunteer potato plants, growing in the same 
vicinity as the potatoes, must be destroyed. This can be done by 
prompt burning as soon as insect infestation is manifest. The burn- 
ing of these weeds will eliminate places for the breeding of the insect 
or for its successful hibernation. Domestic animals, such as sheep 
and hogs, are valuable for the destruction of remnants and may be 
utilized by merely turning them into the field. 
CROP ROTATION. 
As in most other cases of insect injury, crop rotation is desirable 
where possible, and the cooperation of all potato growers of the 
neighborhood is practically a necessity. In certain cases, as, for ex- 
