24 



FARMERS BULLETIN 860. 



I Transformation to the pupa stage takes 



H^^ place in early September in deep trash or 



^^^L jM in an earthen cell slightly below the snr- 



^^B ■ face of the ground. The chrysalis is 



^^^ B plump, brown, and measures about five- 



^^B S eighths of an inch in length. 



^^H ^V Emergence of the moths begins in late 



^■B V September, and many will be on the wing 



^^m mt in early October. The moth (fig. '22) is 



^^H V reddish brown above and slightly lighter 



^^B in shade below. The forewingsare marked 



^^^ with a few fine lines and irregular figures 



in dark brown. The thorax is tufted 

 heavily, the hairs rising on the dorsal part 

 to form a short keel. These months are of 

 considerable size, measuring 1| inches be- 

 tween the tips of the wings, and can be 

 caught readily and recognized if one is watching for insect pests in 

 October. 



Egg laying is at its height in mid-October, and the moths are 

 ]:»rolific layers. The egg is whitish, nearly round, except for a slight 

 flattening at one end. The sides are deeply corrugated vertically. 

 A few tliat have been collected on the bog under natural conditions 

 were found firmly fastened to fallen leaves (fig. 23). 



TUEATMENT. 



Fig. 21. — Cranberry blossom 

 worm: Two larva-. En- 

 larged. 



In the control of blossom worms very 

 obtained from a heavy application of 

 arsenite of lime on June 30. Since the 

 use of this form of arsenical is attended 

 with some risk to the health of the vines, 

 it is preferable to use some other ar- 

 senical, such as arsenate of lead. Apply 

 the latter poison at the rate of 3 pounds 

 of the paste or 1-| pounds of the powder 

 to no gallons of water. This material is 

 frequently used on cranberry vines with 

 the addition of 2 pouiuls of resin-fishoil 

 soap. 



HEFT,0\VTNO. 



Where water is available for fall re- 

 fiowing, a great deal of good may be ac- 



satisfactorv results were 



Fig. 22.— Cranberry blossom worm : 

 Moth, or ijurent. t'onsiderably 

 enlarged. 



