ECONOMIC INSECTS 



21 



man as well as for the grasshopper. All insects must eat, 

 and some eat the same things we wish to eat. Such in- 

 sects we call harmful. Others aid the growth of plants 

 by carrying the pollen dust from one flower to another ; 



Figure 16. — Modern Spraying Outfit. 

 Used to destroy harmful insects. 



others make honey. Such insects are useful. Certain 

 other insects, like the fly, carry the germs of disease. 

 These insects are particularly harmful, for they cause 

 sickness and death. 



