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AGRICULTURE 



The scale may be killed by kerosene washes and sprays, or 

 by a preparation of lime, salt, and sulphur. Badly- infested 



trees, especially peaches, plums, and 

 other stone fruits, are not worth 

 treating. They should be cut and 

 burned. 



Insect Ravages. These are only a 

 few of our many insect pests. We are 

 reminded of the boast of the locusts 

 in the Eastern tale: " We are the army 

 of the great God. We produce ninety- 

 nine eggs. If the hundred were com- 

 plete, we should consume the whole 

 earth and all that is in it." 



Yet, vast and destructive as are the 

 hosts, the farmer can protect his crops 

 to a great extent against their ravages. 

 He can do this in two ways, by cul- 

 tural methods and by poisons. To use 

 cultural means successfully, he must 

 know the life history of the insects he 

 is combating : to use poison success- 

 fully, he must know their structure 

 and habits. 



Cultural Methods. The best means of controlling and check- 

 ing most insects is by cultural methods. 



The leaves, vines, and stubble in which and under which many 

 insects winter should be destroyed. It is often wise to burn these 

 on fields infested with chinch bugs and some other insects. The 

 weeds on which injurious insects feed and breed should be 

 destroyed as far as possible. 



Peach tree dying with San Jose 

 scale 



