120 



ELEMENTARY STUDIES IN INSECT LIFE 



animal life. Man, the predominant type, brings to- 

 gether large areas of the food plants of one insect, and 

 here this insect finds conditions which favor its rapid 

 multiplication. Its destructive possibilities become 

 more apparent when directed against those forms of 

 plant life from which man gains his sustenance ; and in 

 order to subsist, man is forced to turn his attention 

 toward this plant-eating insect. Man has made this 

 condition possible not only by planting large areas of 

 one field crop or of fruit trees, but also by removing 

 the native forests, the homes of the birds, man's friends. 

 Xot only has he destroyed the homes of the birds, but 

 too frequently he has also ruthlessly taken their lives. 

 In discussing our friends and foes, let us subdivide 

 them from the standpoint of the parties interested, 

 and so consider them friends and foes of the fruit- 

 grower, the farmer, the housekeeper, and finally of man 



himself. 



OF THE FRUIT-GROWER. 



The horticulturist is a student of biology, an observer 

 of the workings of life. The life which the horti- 

 culturist studies is represented by that invisible stream 

 of life within twig and leaf. If you would see the 

 results of his studies, look first at the wild crab and 

 then at the Winesap, the Gano, the Jonathan. Has he 

 not studied this life-current well i 



A successful fruit-grower must also be able to de- 

 termine what insects are injurious and what are bene- 

 ficial. To do this, then, he must know their life history, 

 and bv that is meant the time of year when the ee'2's 



/' ~o 



are laid; where they arc laid; when they hatch; 

 whether they hatch out as caterpillars or in a form 



