thoroughly, it was decided to conduct a series of experiments 

 under field conditions and in different sections. These were 

 carried on during the season of 1906, principally by Mr. Louis 

 Stemler, of Matawan, Monmouth county; Mr. Arthur Seabrook, 

 of Husted, Cumberland county, and Mr. Howard Taylor, of 

 Riverton, Burlington county, on their respective farms, but under 

 the general direction of this office. The details of these experi- 

 ments are given in the annual report of this department for 190<), 

 and need not be repeated here. It only need be stated that con- 

 clusions in this bulletin are largely based on the results of this 

 work, successes and failures being both represented, and upon the 

 results obtained by other investigators in other States. The 

 observations and experiences of the past fifteen years in [N^ew 

 Jersey have also been freely drawn upon in framing the practical 

 recommendations. 



There are several species of root-inaggots which have been found 

 injuring the onion and cruciferous crops, but only two, or possibly 

 three, occur in destructive numbers in this State, and as the reme- 

 dies here suggested will do for all, only two forms will be dis- 

 cussed, namely, the cabbage maggot, Fegomyia hrassicce, Bouche, 

 and the imported onion maggot, Pegomyia cepetorum, Meade, and 

 these will be considered in the order named. 



THE CABBAGE MAGGOT. 



Pegomyia hrassicce, Bouche. 



The cabbage maggot is the larva or young of a two-winged fly 

 somewhat resembling the common house fly, but distinctly smaller, 

 measuring only three-sixteenths of an inch in length, Avith a nar- 

 rower and more cylindrical body and proportionately larger wings. 

 In the female the abdomen tapers toward the posterior end while 

 in the male it terminates more bluntly, and in the latter sex the 

 eyes, which are separated in the female, meet on the dorsal surface 

 of the head. In color it is grayish, with a dark stripe extending 

 along the dorsal surface of the abdomen, Avhile the body and legs 

 bear a number of stiff hairs or bristles. If the hind leg of the 

 male ily be carefully examined with a hand lens, a group or tuft 

 of hairs will be found on the underside of the femur at the basal 



