126 



AGRICULTURE FOR BEGINNERS 



which you found them. Find out the time it takes them to change 

 into another stage. Write a description of this process. 



The plant louse produces in its twelfth brood 10,000,000,000,000,. 

 000,000,000 offspring. These are about one tenth of an inch long. 



If all should live, how many miles 

 long would such a procession be if 

 arranged in single file? 



FIG. 1 1 8. PLANT LICE 



FIG. 119. CAGE IN WHICH 

 TO BREED INSECTS 



Flowerpot, lamp chimney, and 

 cloth. (From a photograph 

 furnished by Mrs. Anna B. 

 Comstock, Cornell University.) 



SECTION XXX ORCHARD INSECTS 



The San Jose Scale was one of the most dreaded enemies 

 of fruit trees. It is in fact an outlaw in many states. It 

 is an illegal act to sell fruit trees affected by it. Fig. 120 

 shows a view of a branch nearly covered with this pest. 



