8G MANUAL OF VEGETABLE-GARDEN INSECTS 



tioiis annually ; the first brood of caterpillars })ecomini^ mature 

 about the middle of June, the second early in iVugust and the 

 third in late September or early October. The cateri)illar is 

 slender and loops with the front half of the body when walk- 

 ing. In the next to the last stage, it is nearly an inch in length, 

 pale green in color and striped lengthwise with fine white or 

 cream-colored lines. In the last stage it is nearly uniform pale 

 green, the stripes having become much less distinct. The 

 caterpillars mature in about twenty-five days and then con- 

 struct cocoons in leaves webbed 

 together with silk within which 

 they transform to dark brown 

 pupae about ^ inch in length. The 

 moths emerge in eight days to two 

 weeks and lay eggs for another 

 brood. The egg, is about 5V inch in 



Fig. 60 - The moth of the diameter, globular, flattened above 



green clover worm (X Ij). • i • i t • 



and with coarse ridges radiating 

 from the apex. The eggs hatch in four to six days and the 

 young caterpillars feed on the underside of the bean leaves, 

 eating out irregular holes and when abundant stripping the 

 plants of their foliage. Sometimes the caterpillars also eat 

 holes in the pods. 



When attacking shell beans, the caterpillars may be poisoned 

 by spraying the vines with arsenate of lead (paste), 2 pounds 

 in 50 gallons of water, taking care to apply the spray to the 

 underside of the leaves. On string or snap beans, tobacco 

 dust or extract may be used. It has also been suggested that 

 many of the caterpillars could be killed by spraying the un- 

 derside of the leaves with a strong soap solution. 



References 



U. S. Div. Ent. Bull. 30, pp. 4r)-50. 1901. 

 Conn. Agr. Exp. Sta. Kept, for 190S, pp. 828-832. 



