WEEDS OF ARABLE LAND 



As Shepherd's Purse 

 is a quick-growing 

 annual, which seeds 

 freely in many months 

 of the year, the obvious 

 remedy is the prevention 

 of seeding. To this end 

 the hoe should be kept 

 vigorously at work when- 

 ever the pest appears. 

 In field cultivation also 

 the seeds may be en- 

 couraged to germinate, 

 and then be destroyed 

 by the use of the harrow, 

 or in root crops with the 

 hand or horse hoe. 



Field Pepperwort 

 (Lepidium campestre Br.) 

 is an annual or biennial 

 weed, 6 to 1 8 inches 

 high (Fig. 13) ; it is 

 slightly branched ; the 

 leaves on the stems are 

 almost lanceolate, and 

 arrow-head shaped at 

 the base ; the white 

 flowers are very small, 

 and the ovate rough flat- 

 tened pods about J inch 

 in diameter. Flowering 

 takes place between May 

 and August ; last season 

 (1909) in Lincolnshire 

 it was practically over 



FIG. 13. Field Pepperwort (Lepidium 

 campestre Br.), nat. size, with flower 

 enlarged. 



The weed is 

 E 



by mid-July. 



