INJURIOUS TO CABBAGE AND RELATED CROPS 51 



a scarlet beetle about J inch in length, marked with three black 

 stripes down its back and with a black patch on the prothorax. 

 The insect is native to the region, where it fed originally on 

 wild cruciferous plants, particularly the prairie wall-flower, 

 but it is also found in Europe and Asia. The beetles deposit 

 their red to dark brown, elongate-elliptical eggs, ^ to ^t ^^^^^^ 

 in length, in large loose masses under clods of earth. The 

 mature larva is black above and yellowish beneath, slug- 

 shaped and about J inch in length. The larvae are said to feed 

 mostly at night. When full-grown they burrow into the soil 

 for an inch or so and there transform to bright orange pupse 

 about I inch in length. The winter is passed in the egg stage 

 in the ground. The beetles become noticeable in the fields in 

 July and August and may be found as late as November. 



In Austria the winter eggs hatch in the early spring and the 

 larvre become full-grown in the latter part of April. The 

 beetles appear in May and after feeding a few days go into 

 aestivation in the ground where they remain till September or 

 October. It is quite probable that when the habits of this 

 beetle are thoroughly studied in America, its life history will 

 be found to be much the same as in Europe. 



Spraying with arsenate of lead (paste), 2 or 3 pounds in 50 

 gallons of water, will kill many of the beetles and their larvse. 



Reference 

 Fletcher, Rept. Ent. Canada for 1892, pp. 10-13. 



Other Insects Injurious to Cabbage and Related Crops 



Corn ear- worm : 211 

 Southern corn root-worm : 222 

 Western corn root-worm : 225 

 Carrot beetle : 185 

 Tarnished plant-bug : 192 

 Sugar-beet webworm : 97 

 Southern beet webworm : 101 



