ADDENDA. 



T KNOW my readers will enjoy the perusal of the following 

 ^ able report on the onion maggot by Prof. C. H. Fernald 

 of the Massachusetts Agricultural College. His sugges- 

 tion of rolling the ground just after planting is strongly 

 indorsed by one of my neighbors who has tried the plan : — 



THE ONION MAGGOT. 



HIS HISTORY: HOW HE OPERATES AND HOW TO FIGHT HIM. 



"The onion maggot {Fhorbia ceparum, Meig.) has 

 caused a great amount of injury to the onion crops, both in 

 this country and in Europe. Its life history is briefly as 

 follows : — 



The eggs, which are laid on the leaves near the ground, 

 are white, smooth, somewhat oval in outline, and about one- 

 twenty-fifth of an inch long. Usually not more than half a 

 dozen are laid on a single plant, and they hatch in about a 

 week from the time they are laid. The young larva, as soon 

 as hatched, burrows downward within the sheath, leaving a 

 streak of a pale-green color to indicate its path, and, making 

 its way into the root, devours all except the outer skin. 

 When the bulb of the plant has begun to form, several of 

 the larvEe may be found feeding in company in it ; and after 

 it has been consumed, they desert it for another, and still 

 others in succession. 



