186 INSECTS INJURIOUS TO VEGETABLES 



seeds and are nearly mature, they enter the stems, feed on the 

 soft lining, and transform to iDUpx. They sometimes destroy 

 newly-sown parsnip, eating the tender leaves, but in attack on 

 older plants they eat the umbels or flower heads and the inte- 

 rior of the stems. 



Remedies. — A thorough spraying with arsenicals will destroy 

 this webworm. To prevent injury by it avoid planting parsnips 

 in or near waste places which have become overrun with wild 

 carrot. 



Miscellaneous Insects. — Among other insects injurious to 

 celery the tarnished plant-bug is an important species. It is 

 figured and described on pages 87 and 88. The cotton leaf-bug 

 (Calocoris rapidus Say), a species of somewhat similar habits 

 and appearance (fig. I20.r), also attacks celery and is amenable 

 to the same remedial treatment. 



