Cabbag-e Fly and Onion Mag"g"ot. 



6§4. What, in your opinion, is the most effective means (without change of ground) 

 f)f preventing the ravages of the onion antl cabbage maggot ? 



In reply, we quote from Bulletin ii, of the Central Experimental Farm. 



Imported Cabbage Butterfly (Fieri^ 

 rap(S, L.). — The white butterflies which fly 

 over cabbage beds during summer, lay eggs 

 on the leaves, from which are hatched the 

 troublesome Cabbage-worms. 



Remedies. — The best remedy for this in- 

 \\\"\\a\\\X gg(,(. jg undoubtedly insect powder diluted 



Fig, 719. with four times its weight of common flour. 



Onion Maggot (Phorbia ceparum, Mei- 

 gen). — Equalling in destructiveness and more 

 difficult to deal with than the Cabbage and 

 Radish Maggots, is the Onion Maggot (Fig. 

 720.) 



Remedies. — Rich, well-worked soil and 

 early planting are advised. 



1. Kerosene emulsion watered along the 

 rows when the onions are found to be infested, 

 has proved successful. 



2. A sprinkling of gas-lime, sown broad- 

 cast over the beds every two weeks, was also 

 found to protect the crops considerably, and 

 was thought to act as a good fertilizer. 



Suggestion. — I would suggest the use of nitrate of soda, at the rate of 200 

 lbs. to the acre ; this is a valuable fertilizer, and has been found of marked use 

 in checking the ravages of the Cabbage Maggot. In addition to nitrate of soda, 

 kainit has been used with great success in the State of New Jersey, by some of 

 the large vegetable growers. 



Onion Maggot. — Fig. 720- 



Tomato Rot. 



I 



68''S- What is the best preventive for tomato rot? Is tliere any preventive for the 

 ravages of cut-worms in strawberry plantations ? 



Reply, by Prof. Fletcher, of Central Experimental Farm, Ottawa. 



If true cut-worms are really meant in this question, my answer is that the 

 best remedy is the use of the poisoned traps mentioned on page 27 of Bulletin 



(36) 



