<)4 Agricultural Experiment Station, Ithaca, N. Y. 



beai'er. For the curculio, there is no good remedy upon the apple. 



It is doubtful if its numbers are greatly lessened by arsenical sprays. 



Some persons have recommended the planting of plum trees in the 



apple orchard for the purpose of attracting the curculios, and from 



these trees the insects can be jarred onto sheets. It is a question^ 



however, if the 



plum trees would 



not attract more 



curculios into the 



orchard than they 



would lure away 



from the apple 



trees. 



One reason for the 

 serious infection of 

 apple orchards with 

 many pests is the long 

 life of the orchard 

 itself, making it im- 

 possible to rotate the 6. work of the cigar-shaped case-bearer. June 14. 



crop. It is well known that a frequent and proper rotation of crops 

 is one of the most efficient means of keeping insects and fungi in 

 check. This is true even of small-fruit plantations. Our best 

 blackberry and raspberry growers, in regions where there is likely 

 to be trouble with anthracnose and root-galls, fruit their plantations 

 only two or three years, and by the time the enemies become threat- 

 ening the patch is destroyed. But with apple orchards this is impos- 

 sible. The large, thick-topped trees become unmolested breeding 

 places for disease decade after decade. So orchards, of all other 

 crops, should receive the most painstaking treatment for insects 

 and fungi. 



