28 SPRAYING CROPS 



Soda Hyposulphite Dissolve ^ ounce or i ounce 

 soda hyposulphite in 10 gallons water. This is espe- 

 cially recommended for gooseberry mildew. 



Lye Solution Professor William B. Alwood 

 recommends a solution oi 8 cans of concentrated lye 

 in 50 gallons water for spraying on trees and vines 

 early in spring, before the buds are started, to kill 

 fungus spores. If applied after buds are started 

 much damage might result. 



Formaldehyde-Glycerine Mixture Professor F. 

 D. Chester has lately used with success the follow- 

 ing combination in treating pear tree canker : 

 Formaldehyde (40 per cent), i pint; glycerine, 2 

 pints; water, 17 pints. 



Caution Most of the copper compounds cor- 

 rode tin and iron. Consequently, in preparing them 

 for use, earthen, wooden or brass vessels should be 

 employed ; and in applying them the parts of the pump 

 which come in contact with the liquid should be made 

 of brass. 



COMBINATIONS OF INSECTICIDES AND FUNGICIDES 



Soon after fungicides came into prominence in 

 this country, the writer called attention 1 to the advan 

 tages of so combining them with insecticides that both 

 may be applied at the same time and in the same 

 mixture. Before then, entomologists had worked out 

 remedies for insects, and botanists remedies for plant 

 diseases, but very little had been done in so combining 

 the treatment that the practical man might, so to 

 speak, "kill two birds with one stone." In the article 

 referred to I said : "The necessity of treatment for 

 both classes of injuries is at once apparent to all who 

 have experienced the serious losses due to these agents. 

 Obviously, it is of little use to save a plum crop from 



lAgricultural Science, 1889. 



