I06 INJURIOUS INSECTS. 



and history, and the methods of destroying them 

 are the same. Professor C. M. Weed recommends : 

 ( I ) The kiUing of the worms before the crops are 

 planted by strewing over the soil bunches of fresh 

 clover, or cabbage leaves, which have been treated 

 with Paris green, or London purple, either by dip- 

 ping into a solution of the poison, or dusting it on 

 dry. The half grown worms prowling about in 

 search of food eat of the baits thus set and are 

 destroyed before doing any harm. Of course care 

 must be taken that poultry or stock do not get at the 

 poisoned leaves.* (2) Placing boards on the ground 

 in and about the garden or field, and collecting in 

 the morning the worms that will congregate beneath 

 them during the night. ( 3 ) Digging out the worms 

 where plants have been cut off. This is practicable 

 in most cases, and is well worth doing, thus prevent- 

 ing further damage. 



THE CABBAGE ROOT MAGGOT. 



The presence of this pest, when it occurs in 

 considerable abundance, is indicated by a checking 

 of the growth of the plant, a tendency to wilt badly 

 under a hot sun, and a sickly bluish cast of the 

 foliage. On pulling the wilted plant, most of the 

 roots will be found to have been eaten, and the 

 remainder in a decaying condition. The adults are 

 small, black, two-winged flies resembling the com- 

 mon house fly. They appear in early spring and 

 deposit their eggs in crevices of the soil close to their 



*A mixture of equal parts of bran and middHngs, twelve or fifteen pounds 

 mixed with one pound of Paris ereen, answers as well for a Bait as 

 poisoned leaves. This can be used dry or wet. 



