INJURIOUS INSECTS. 93 



they should be broken up and grown in some cultivated crop 

 for two years. The beetles should be trapped as recommended 

 for cut worm moths, when they become very abundant. Such 

 animals as moles and shrews should always be permitted or 

 even encouraged in our lawns and gardens and the little dam- 

 age they generally do suffered patiently, since they are among 

 our best friends and destroy immense numbers of white grubs 

 and other insects that live in the ground, and are difficult for 

 us to reach. 



Maggots [Anthomyia sp.) They are often destructive to the seed 

 or roots of a variety of plants including onions, cabbage. 



cauliflower and similar 

 plants; they also attack the 

 seed of corn. peas, beans 

 and other vegetables some 

 **» seasons. 



Life History. The 



maggot here referred to is 



the larvae of a fly some- 



rv. . what resembling the house 



M fly. but brown in color. 



The eggs are laid in or 



near the surface of the 



ground, generally on the 



food plants and hatch out 



in about two weeks into 



maggots, that commence to 



„. (< T> '~ feed at once and finally be- 



Figure 41.— Bean and onion maggot. J 



come one-half inch long: 



these change in two weeks more to flies. This insect winters 

 over in the pupa state in the ground. 



Remedies. When this insect attacks onions the infested 

 plants turn yellow and look sickly and they should be pulled 

 and destroyed. The same treatment should be given to any 

 onions that may be found infested at harvest time. When on- 

 ion land becomes badly infested with this pest, crop rotation 

 should be practiced and no onions should be raised near it for 

 a year or two. When beans, corn and peas are affected, the 

 seed should be treated with a very thin coating of coal tar and 

 afterwards rolled in plaster or other dust. The coal tar may 



dUIEU 



