358 Diseases of Truck Crops 



Wild Carrot (Daucus carsta), wild parsnip {Pastinaca 

 sativa), and poison hemlock {Cornium maculatum). 

 All of these weeds should be eradicated by clean cijl- 

 ture. The first two especially help to carry the 

 fungus of early blight, Cercospora apii. 



