58-i 



NEW JERSEY AGRICULTURAL COLLEGE 



cation l)e made a I as early a period as possible after the work of the 

 maggots is noticed, for the smaller the insects the less they have 

 bored into the i)lant and the more easily are they reached and killed. 



It is also a good ])lan, wherever a wilting plant is noticed, to take 

 it out with a (rowel, so as to be sure to get all the maggots around it, 

 and put plant, maggots and all into a pail. When all infested plants 

 are collected in this way, drench with kerosene and bury at least six 

 inches deep, firming the ground so that in case a pupa escapes the oil 

 the developing fly will be unable to work its way out. 



Finally, onions slunild not be grown on the same ground two years 

 in succession if it can be avoided, and the new field should be as far 

 removed as possible from the old one. 



Growing onions under these conditions means work and constant 

 observation, but while neglect is apt to result in ever-increasing injury, 

 constant care and attention will result in an ever-decreasing percentage 

 of loss. 



THE CORNSTALK BORER. 



Hydroccia nehris Gn. 



Each year there is some complaint of a borer in corn and tomatoes ; 

 occasionally, also, in potatoes, and sometimes, as in the season just 

 past, considerable injury is done. The borer, when first noticed in 



middle or late June, is a 

 slender caterpillar about an 

 inch in Icngtli, with the two 

 ends of the body unlike in 

 markings. There is a dark 

 band on the back that ex- 

 tends from one . end to the 

 other, but on the sides the 

 stripes extend only to the 

 middle of the body, where 

 there is a dark belt. 



It is at that season and 

 in that stage tliat it attracts 

 most attention, and when 

 most of its notable injury is 

 done. Later in the season, say about the end of August, when the 

 borer is full grown, it is altogether different in appearance. It is tlien 



Fig. 24. 



Cornstalk borer, Hydroecia nehris Gn. : motli above; 



half grown larva below— the latter 



enlarged. Original. 



