IXKKCTS, lT.\(iI, 1>LA.\T DISKASKS, KTC 



121 



Remedies. — Hand-picking and rotation in crops will 

 greatly reduce the number of insects. The use of a solu- 

 tion of hellebore, three ounces to sixteen gallons of hot 

 water, applied without dilution, is also recommended. 



Cabbage Worm (Pieris rapae, Linn.). — This is a foreign 

 insect i n t r o d u c e d 

 many years since 

 from Europe. It is 

 well known in all sec- 

 tions of the United 

 States where the cab- 

 bage plant is culti- 

 vated. The butterfly 

 is light cream color, 

 about two inches 

 across the expansion 

 of the wings. The worm is green with a yellow stripe ex- 

 tending down the back, with small yellow spots on each 

 side. The greatest damage is committed by the worm. 

 It eats the leaves, destroying them completely. There are 

 two broods in the South. 



Plants Injured. — Cabbages. 



Remedies. — Paris green, one-fourth of a pound to a 

 barrel of water, sprayed on the plants. 



Fig. 21 — Pieris protodia 

 alis. Riley, Div. 

 Agri. Report, 1889. 



. a, Larva, b, Chrys- 

 Ent. U. S. Dept. 



Fig. 22 — Pieris protodice. Male 

 butterfly. Riley, Div. Ent. 

 U. S. Dept. Agri. Report, 1883. 



Fig. 23 — Pieris protodice. Female but- 

 terfly. Riley, Div. Ent. U. S. Dept. 

 Agri. Report, 1883. 



Pieris protodice and P. monuste are two other species of 

 the cabbage worm which are also found in the South 



