258 Mississipiji Valley Horticultural Society. 



than as actual criminals. If we seek to extract the essential substiince of 

 the preceding discussion of the strawberry insects, we shall lind that the 

 really im])iirt:uit jiractical measures can be briefly sumniarized in a few sen- 

 tences. 



Recollecting what was said on a preceding page, of the strawberry enemies 

 of the first class, and analyzing the recommendations of remedies found ef- 

 fective against them, we shall see that the capit^xl measures of defense are 

 about live in number. If we apply pyrethrum, or use the hand net, or some 

 mechanical device of similar action, for the tarnished plant bug and its allies, 

 which attack the plant before its fruit is picked ; if we poison the foliage in 

 midsummer to kill the beetles of the root-worms, or use carbolic acid or bi- 

 sulphide of carbon or its compounds, in the ground, to destroy these insects 

 on their first appearance in the field : if we mow and burn the field in mid- 

 summer after the fruit is picked, to exterminate the leaf-rollers and other 

 leaf-eating insects ; if we change the crop occasionally, when noxious species 

 multii)ly inordinately; and if proper pains be taken to prevent the transfer 

 of the crown-borer from old to new plantations, we shall have done about all 

 that the economic entomologist can advise against the worst enemies of the 

 strawberry'. While it is not to be supj^osed that the strawberry insects can 

 be completely cleared out of an infested field, and altogether kejjt out after- 

 wards, it is certain that where noxious insects are numerous and destructive, 

 the above measures of defense will be found highly profitable, considered 

 merely as an investment of time, labor and money. 



