The Question Box. 395 



spores cannot be washed down and lodge on the tubers, while 

 those lying near the surface will be inoculated. When the pota- 

 toes are hilled up, if the season is wet, the spores are washed 

 off and into the spaces between the rows. That is a part of the 

 explanation of the remedy. Spraying with the Bordeaux mixture 

 will be found a much better and surer preventive than the 

 hilling-up system. I had much experience on Long-Island during 

 one season, where we sprayed eight acres. We got no blight 

 on either the sprayed or unsprayed vines. It cost $4 per acre 

 to spray those potatoes, and, although we got no results in one 

 direction, because the rot did not appear, we got G3 bushels more 

 per acre on a piece of " White Elephant " than we did on the 

 same area of the same variety that was not sprayed. But we 

 used paris green mixed with the Bordeaux, which killed the 

 potato flea beetle and other insects which feed on the vines. But 

 it is the soft^ stringy rot which the Bordeaux prevents. The 

 dry, hard rot is a disease which works below the surface and 

 will not be prevented by spraying. No disease working under 

 ground that Is not caused by something attacking the plant or 

 vines above ground, will be prevented or cured by spraying. The 

 hard, corky rot is not caused by leaf blight, but by a soil germ. 

 So that spraying the vines will not reach the' tubers. 



Is there any spray that will destroy the moth spots on apples? 



Mr. Tyler. — It is not the regular scab that is meant. To pre- 

 vent the regular scab fungus, the Bordeaux is used as a spray. I 

 spray before the buds open; then twice after the blossoms fall. 



Would you spray for potato blight? If so, what ingredient would you 

 use? 



Mr. Litchard. — We have had but very little blight in our lo- 

 cality. I use vitriol, 4 pounds, and stone lime, 6 pounds. It 

 is, practically, Bordeaux mixture. 



Does the forest tree worm Ijill the timber? 



Mr. Cook. — It would depend how severely he worked on the 

 leaf. I don't know what can be done economically to kill them. 



