ASPARAGUS INSECTS 97 



and destroy all volunteer plants in spring to force 

 beetle to lay eggs on new shoots which are cut often ; 

 poison plants after cutting with arsenate of lead ^Yz 

 pounds, and soap 4 pounds, to 50 gallons of water ; 

 clean up rubbish. 



The 12-SPOTTED ASPARAGUS BEETLE ^^ {Crloccris 

 duodecimpunctata ) 

 Order — Coleoptera 



This was not found until 1881 and then near Bal- 

 timore; it is a less common and less injurious spe- 

 cies than the former one but lives exclusively on 

 asparagus ; the adult beetles cause the injury. ' 



The beetle is reddish-orange and has six black 

 dots on each wing-cover; the elongate oval green 

 eggs are deposited on the plants in June; the egg 

 hatches in 7 to 12 days and the grub at once bores 

 into a berry and usually enters about three berries 

 before it becomes full-grown; when grown it pu- 

 pates in the soil ; there are two generations here in 

 New York, the first brood of beetles appearing in 

 late July and the second in early September. 



Control — Same as for former species. 



The ASPARAGUS MINER ^^ (Agrofjiyj^a simplex) 

 Order — Diptera 



The stalks of asparagus are often injured by the 

 larva of a fly that mines beneath the epidermis; 

 the mines are often so abundant that they have the 

 effect of girdling the stalk. 



The white eggs are stuck in the sides of the stalk 

 just beneath the epidermis ; they hatch into the small 

 maggots that mine up and down beneath the epi- 

 dermis; when the larv?e attain their growth they 



13 Chittenden— U. S. Bit. Ent., Bull. 66, Pt. I. 

 Fink — Cornell Univ. Expt. Stat, Bull. 331. 



14 Fink— Cornell Univ. Expt. Stat., Bull. 331. 



