INSECT PESTS AND THEIR CONTROL 227 



ground. Scatter poison bran mash when the caterpillars appear, or spray 

 or dust with arsenicals. 

 Bur. Ent. Bull. 29. 



TRUCK CROP INSECTS 



The Asparagus Beetle (Crioceris asparagi, Linn.) . This beetle is about 



one-fourth of an inch long, with 

 dark-colored body, red thorax and 

 yellow wing covers marked and 

 bordered with blue. The adults 

 and grubs feed on the stems and 

 tender shoots of asparagus. 



Treatment. Apply arsenical 

 sprays. Air-slaked lime will kill 

 the grubs. 



Bur. Ent. Cir. 102. 



Bean Aphis (Aphis rumicis y 

 Linn.). A small black plant louse 

 with pale shanks. It attacks beans, 

 dock, shepherd's purse, pigweed, 

 " burning bush" and snowball 

 bush. 



Treatment. Spray the plants 

 thoroughly with nicotine solution. 

 Bur. Ent. Bull. 33, p. 109. 



Bean Weevil, The Common 

 (Bruchus obtectus, Say.). A small 

 gray or brown beetle with mottled 

 whig covers, about one-eighth of 

 an inch long. It lay its eggs on or 

 in beans in the field, also breeds in 

 stored beans. The grub eats its 

 way into the bean and develops 

 there, sometimes several to one 

 bean. 



Asparagus tip at right, showing eggs and Treatment. Heat the infested 



injury. Natural size. seed or fumigate with carbon 



bisulphide. 



Bur. Ent. Bull. 96; Year-Book, U. S. D. A., 1898, p. 239. 

 Other Bean Weevils. Several other weevils affect the bean in March, 

 in the same way as the common bean weevil. 

 Treatment. See Bean Weevil, the Common. 



The Beet Army Worm (Laphygma exigua, Hbn.). Beets are some- 

 times attacked in the Western states by this insect at about the same time 

 the fall army worm is making its attacks in other sections. Several 



SPRAT OP ASPARAGUS, WITH COMMON ASPAR- 

 AGUS BEETLE IN ITS DIFFERENT STAGES. 1 



Bur. Ent. Cir. 102. 



