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crops and trees from insects. They prefer to wait until the damage is 

 evident — but then it is too late for effective action. Their experiences 

 with the Potato Beetle, the Codling \\'orm, Grasshoppers, Horn Fly and 

 House Fly must still be very vivid, but probably next year their attitude 

 will remain the same as ever. A few persons, however, are converted and 

 take action in time. This is the real hope of the situation. 



