has increased in injurioiisness from year to year. Frequently entire 

 crops over considerable areas are completely destroj^ed. 



Two or three generations of this maggot are indicated in the Northern 

 States, and perhaps four or live in the South. 



METHODS OF CONTROL. 



Since this species also is a root-feeder, the remedies prescribed for the 

 seed-corn maggot are applicable. In addition there are certain prevent- 

 ive and other measures for its destruction that have been found success- 

 ful, their use being justified by the great value of cabbage plants. 



Carholic-dcid emulsion, prepared as prescribed on page 2, and diluted 

 about 35 times, is particularly applicable when this maggot occurs on 

 radish and other plants than cabbage and caulitlower. 



Hand picking , although laborious,. lias the merit of being effective, 

 and is practiced with considerable success by extensive cabbage grow- 

 ers, although not practicable on radish and similar crops. It consists 

 in pulling up the young cabbage or cauliflower plants, examining the 

 roots for eggs and maggots, and either destroying the eggs and maggots 

 by crushing with the hand or by washing the roots in a strong solution of 

 soap and then replanting. In most cases the plants show no ill effects 

 from this treatment after two or three weeks have elapsed. By looking 

 closely, the minute white eggs may be seen about the stalks of young 

 cabbages, and if the earth be raked away so as to expose the eggs to 

 the sun these will dry up, thus preventing the maggots from hatching. 

 Afterwards the plants should be hilled. 



Methods of culUvation. — Experience shows that comparatively little 

 is to be expected from various farming methods which are sometimes 

 perfect safegards against other insects, ^^llatever might be advised and 

 found successful on one farm might, for one or more reasons, be found 

 ineffective on another. 



By keeping the soil well hilled around the plants the cabbngt' <levelo])s 

 more roots, thus affording more food for the maggots and still leavintj; 

 enough roots to strengthen the plant itself. 



Crop rotation should be followed with an^' plants other than ci-ucifers 

 or onions. With these latter it is inadvisable, as the same atmospheric 

 or other conditions which induce injury by the cabbage maggot seem (o 

 operate in increasing the numbers of the onion pest, which has a similar 

 distribution. 



Fall ])lowing is advisabh^ 



Crop renmants of all ciiicifers, and particularly cabbagi! stumps, should 

 be removed and destroyed, especially early in the season. Late in the 

 fall a less numl)er of maggots would be destroyed in this wa}', but it is 

 always a desirable method for the protection of the crop against other 

 pests wlii(!li harbor in the old stalks or feed on the new leaves in early 

 winter, to ai)i)ear the next spring. 



