GRASSHOPPERS AND OTHER INJURIOUS INSECTS OF 1911 AND 1912. 



97 



Fig. 69. Diagram, showing plan of bridge-grafting, skill, 

 Ohio Experiment Station. 



ounce of prevention 

 .ally worth several pounds of cure. 



Applying repellent washes to 

 tree trunks and shrubbery (see 

 above) is strongly recommend- 

 ed by this office, as is also the 

 mechanical guards described on 

 a previous page. 



We have not much faith in 

 the low so-called ''rabbit-proof" 

 fence, since in times of drifted 

 snow it is no obstacle, and unless 

 a barbed wire is buried below 

 the fence or the lower edge of 

 the fence itself inserted a few 

 inches in the ground, the ani- 

 mals may burrow beneath it. 



A valuable tree girdled by 

 rabbits (or mice) can sometimes 

 be saved by bridge-grafting, 

 which consists of inserting the 

 end of several scions into in- 

 cisions in the live bark below 

 and above the injury, the ends 

 of each scion being first cut into 

 a wedge-like shape. Grafting 

 wax should be carefully and lib- 

 erally aplied at points of union 

 of scion with stock, and all 

 wounds thus carefully covered. 

 This requires some technical 

 and, as said above, "an 

 "is gener- 



