286 



PESTS OF ORCHARD AND SMALL FRUITS 



Fig. 418. — Cocoons of the Imported 

 Currant Worm. Original. 



the spraying is done early, arsenate 



fruit is coloring, use 



hellebore. 



The Native Cur- 

 rant Worm (Di- 

 phadnus appendicu- 

 latus Hartig) causes 

 similar defoliation. 

 The larva is half an 

 inch long, and light 



The pupal stage is passed in 

 little cells in the soil. There 

 are two generations, one lot of 

 worms appearing in early sum- 

 mer and the second brood five 

 or six weeks later. Hibernation 

 takes place in the pupal stage. 

 The adult is a sawfly. 



Until currants are ripe the 



best remedy is an apphcation 



of Paris green and lime. If 



of lead may be used. When the 



Fig. 420.— Adult of the Native Cur- 

 rant Worm. Enlarged and natural 

 size. Original. 



Fig. 419. — Adult of the Imported Cur- 

 rant Worm. Enlarged and natural 

 size. Original. 



green, without black spots. There 

 are two generations. The adult 

 is a sawfly. The measures of con- 

 trol are the same as for the im- 

 ported currant worm. Paris green 

 may be used safely until the fruit 

 is half grown, 



