The Question Box. 397 



closely to examine all our trees and shrubs and to spray them, 

 and, if we find it very prevalent, cut down the tree and burn it. 

 It will not do to pass the matter lightly and thus neglect the 

 trees, else all our orchards, shrubs and, it may be, our forest trees 

 will soon be destroyed. Nor should we buy nursery stock of any 

 one that has not been thoroughly inspected or fumigated. All 

 the nursery stock sent out of the nurseries in Maryland is fumi- 

 gated with hydrocyanic acid gas, which kills alF insect life on it, 

 and the result is that more orders are being received for stock 

 there than the nurserymen can fill. 



What is the best spray to kill the rose-leaf hopper? I have tried Insect 

 powders, whale oil soap, tobacco, etc., but they failed to have any effect 

 on the hoppers. 



Mr. Chapman. — Prepare a mixture made of 20 pounds of whale 



oil soap, 20 pounds of caustic potash, and 1 gallon tar. Put this 



in 100 gallons of Bordeaux and green arsenic. Spray the bushes 



with the mixture. 



What is the remedy for blight on strawberries? 



Mr. Converse. — Spray them before the blight appears, with the 

 Bordeaux mixture. Do not wait for the blight to appear. Spray- 

 ing will not cure, but prevent blight on strawberries. 



What will prevent curl-leaf on the peach? 



Mr. Mann. — I have sprayed with Bordeaux to prevent it, begin- 

 ning just before the buds opened. Results so far are very satis- 

 factory, I expected that Cornell would issue a bulletin giving 

 full information ere this time. 



Mr. Willard. — The foliage of the peach is very sensitive, so 

 spraying must be done with great care. 



At the meeting of the Western New York Horticultural Society, Mr. 

 Powell of Syracuse, said that the San Jos6 scale could be communicated 

 from apple peelings and orange peel, to trees, and thus spread. Was he 

 correct ? 



Prof. Slingerland. — The San Jos^ scale does not work on the 

 orange. That is another chap. There is a chance for a live scale 

 to be communicated from an apple peeling to a tree, but only one 



