The Bean 



239 



of water. On snap beaus tobacco dust may be used to drive 

 the caterpillars from the plants. 



Gkeen clover worm (Plathypena scabra). — While the more 

 usual food plant of this insect is clover, it sometimes becomes 

 very destructive to beans. The caterpillar when full grown is 

 nearly an inch in length and striped lengthwise with whitish 

 lines. Control: The caterpillars may be poisoned by spraying 

 with arsenate of lead (paste), 2 pounds in 50 gallons of water. 

 On string beans, where the poison would be obectionable, the 

 tobacco dust may be used. 



Seed-corn maggot (Phorhia fuscioeps). — It sometimes hap- 

 pens, especially in cold backward seasons, that seed beans 

 in the ground are attacked by a small whitish maggot that 

 either entirely destroys them or so injures the bud that when 

 the plant comes up no leaves are produced. Much of the 

 injury may be avoided by planting the seed rather shallow. 



As the beans are of so many kinds and types, we must 

 state the main sftuation at the outset: 



1. Broad bean, the 

 bean of history, a 

 hardy plant little 

 raised in this country 

 and very different 

 from any of the fol- 

 lowing. — Vicia Faba. 

 Figs. 128, 129, 130, 

 all representing Broad 

 Windsor. 



2. Common bean of 

 ISTorth America, kid- 

 ney bean of the English, haricot of the French. — Phaseo- 

 lus vulgaris: 



a. Snap or string beans, in which the green pod and 



128. Seeds ot broad tean.— Broad Windsor (X 



