POTATO 217 



ground, early or leaf blight, late or true blight (some- 

 times called rot), brown rot, the flea-beetle, and the 

 potato-beetle, or potato-bug. These can one and all be 

 controlled by spraying with a mixture of Bordeaux mix- 

 ture and Paris green. Convincing figures are given in 

 Bulletin No. 221, New York Experiment Station, 



Fig. 104. Adult of the Colorado Fig. 105. Potato flea-beetle, 



beetle, or " Potato bug." Much enlarged. 



Geneva, 1902, also Bulletins Nos. 264 and 267, 1905, 

 to show that not only for diseases and pests but also 

 for the plants themselves Bordeaux mixture mixed with 

 some arsenite, usually Paris green, will give results that 

 will more than repay the cost. " Commence spraying 

 when the plants are six to eight inches high and repeat 

 the treatment at intervals of about two weeks as long 

 as the plants remain green. Usually six applications will 

 be required. Use the one to eight formula Bordeaux mix- 

 ture, adding Paris green or other arsenical poison when 

 'bugs' are plentiful." Apply thoroughly. It is not wise to 

 wait for the appearance of disease, but "those who wish 



