CABBAGE. 



157 



remedies are: red pepper, soot, lime, ashes, salt, sulphur, 

 solution of copperas, yeast, soap-suds, etc. Water heat- 

 ed to one hundred and forty, or even to one hundred 

 and sixty degrees, was at one time highly praised as an 

 insecticide; but the same objection applies to it as to the 

 others. Were it not hazardous to apply to the eatable por- 

 tions of vegetables, like the cabbage, etc., poisons danger- 

 ous to man, we would have an effective means in Paris 

 green or London purple for the removal of these insects. 

 The remedy for cabbage- worms, tested and recom- 



Fig. 30. ZEBRA CATERPILLAR (Mamestra pictd). 

 a, Larva ; 6, Moth. 



mended by our best authority on such matters, Prof. 

 Riley, is Pyrethrum powder. This is also called "Dal- 

 matian," or "Persian Insect Powder," and the name 

 "California Buhach," is given to the fresher and there- 

 fore more effective Californian product. This is not a 

 mere deterrent, rendering the part of the plant it touches 

 obnoxious to the worm, but it acts as a poison by con- 

 tact, convulsing and paralyzing the insect. While this 

 powder is very effective with some kinds of insects, it is 



