CABBAGE MAGGOT 51 



some force through a syringe or force pump, it might not be 

 necessary to go to the trouble of first removing some of the 

 earth from about the plants. It must be remembered that 

 its success will depend on the eggs or maggots being hit 

 with it. None of the Cabbages in our experiment were in- 

 jured in the least by an application containing nearly twice 

 as much of the acid, and there is but little danger of its 

 injuring the tenderest foliage of radishes, turnips or onions; 

 if any injury manifests itself on these crops, dilute the 

 emulsion with 40 or 50 or more parts of water, instead of 30. 

 A knapsack or wheelbarrow sprayer would prove a very use- 

 ful instrument in applying the emulsion on a large scale." 



The carbon bisulfide is best injected into the soil by 

 means of a long-nosed syringe. Slingerland (Cornell Bulletin 

 78) illustrates a specially made syringe or injector for this 

 purpose : "Thus Cabbage plants can be treated once, and 

 once is usually sufficient, at the rate of about 10 plants for 

 1 cent for the liquid, using about 1 teaspoonful to each 

 plant. As the injector will last for years, and several 

 neighbors might join in the purchase and use of one instru- 

 ment, its cost would practically not influence this estimate 

 of the cost of killing the maggots. We believe it is the 

 cheapest, most effective, and most practicable method yet 

 devised for fighting this pest on crops of Cabbages and 

 cauliflowers; on crops of radishes, turnips, or onions it will 

 probably be too expensive except where choice or new va- 

 rieties are attacked. The carbolic acid emulsion will prove 

 the most practicable on these last crops." 



The club-root, which causes the roots to become greatly 

 thickened and distorted, is difficult to manage if Cabbages 

 or allied plants are grown continuously on land in which 

 diseased plants have been raised. Changing the location 

 of the Cabbage or Cauliflower patch is the best procedure. 

 If very different crops, as corn, potatoes, peas, tomatoes, 

 etc., are grown on the land, the disease will be starved out 

 in two or three years, 



