208 VEGETABLE FOES AND DISEASES 



the moth comes out, sometimes in May but usually 

 later in the summer. 



Attack by Cabbage Moth caterpillars occurs regu- 

 larly in the summer and autumn of each year, which 

 is not to be wondered at, for they feed on leafage of 

 many common plants, even such wildlings as the Dock, 

 and may be found in the flower garden on Dahlias, 

 Geraniums and Marigolds, also in fruit quarters, on 

 the Red Currant ; therefore the infection may easily 

 be due to outside influence. The attacks, however, 

 are most demonstrative on Cauliflowers, and on the 

 hearts of Cabbages and Savoys in the late summer 

 and autumn, for the caterpillars are very voracious, 

 feeding by day and night, and, what is worse, they spoil 

 with their excrement more than they eat. The excre- 

 ment from the caterpillars either remains in lumps 

 between the leaves, or spreads downwards in wet dirty 

 green matter. Besides, the caterpillars gnaw large 

 holes into the hearts of the Cauliflowers, Cabbages or 

 Savoys, and render the infested plant truly disgusting, 

 of which some faint idea may be seen in figure E. 



Prevention. The moth appears in May and June 

 and later, i. To capture them : (a) Fix a post in the 

 ground firmly and standing out about three feet, the 

 top being cut off square. Affix a wide tray, wooden 

 or metal, on the post and smear it inside with a 

 sticky substance, such as two parts resin and one part 

 sweet oil melted. Place a thin block of wood in the 

 centre of the tray, and on this stand a hurricane 

 lamp. Light it at dusk each night. The moths 



