180 
SUMMARY OF REMEDIAL MEASURES. 
The attention of the practical fruit grower is properly concentra- 
ted on the relatively smali number of insects known as_ positively 
destructive, the other species infesting his crops being regarded 
rather as suspicious characters than as actual criminals. If we seek 
to extract the essential substance of the preceding discussion of the 
strawberry insects, we shall find that the really important practical 
measures can be briefly summarized in a few sentences. 
Recollecting what was said on a preceding page, of the straw- 
berry enemies of the first class,* and analyzing the recommenda- 
tions of remedies found effective against them, we shall see that the 
capital measures of defense are about five in number. If we apply 
pyrethrum, or use the hand net, or some mechanical device of sim- 
ilar action, for the tarnished plant bug and its allies, which attack 
the plant before its fruit is picked; if we poison the foliage in mid- 
summer to kill the beetles of the root-worms, or use carbolic acid 
or bisulphide of carbon or its compounds, in ‘the eround, to destroy 
these insects on their first appearance in the field; if we mow and 
burn the field in midsummer after the fruit is picked, to extermin- 
ate the leaf-rollers and other leaf-eating insects; if we change the 
crop occasionally, when noxious species “multiply ‘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 supposed that the strawberry in- 
sects can be completely cleared out of an infested field, and alto- 
gether kept out afterwards, 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. 
*Page 61, 
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