45 



day, and to apply immediately on the rows some of the petroleum emul- 

 sion of which the formula is here given : — 



Petroleum (coal oil), 2 gallons; rain water, 1 gallon; home-made 

 soap, 1/2 pound. 



Boil the soap in the water so as to dissolve it ; pour that solution in 

 the oil and stir briskly the whole together for five minutes in order to make 

 a creamy emulsion. Mix one part of this solution in nine parts of water 

 and sprinkle on the rows. 



2. Instead of the petroleum emulsion, one may use the following 

 remedy: Incorporate bj^ mixing it well with half a pint of petroleum in 

 three gallons of sand, well pulverized land plaster or ashes, and sow this 

 mixture on the rows of young carrots just after thinning. 



3. You may also use, instead of petroleum, some crude Carbolic Acid 

 prepared as here indicated : Boil one pound of home-made soap in one 

 gallon of water so as to dissolve it, pour in that solution one pint of car- 

 bolic acid. Boil the whole together for a few minutes, all the while stirring 

 briskly. Dilute one part of this solution in fifty parts of water and use it 

 to sprinkle the j^oung carrots as has been indicated for the petroleum emul- 

 sion. It is with this remedy that I have had the best success. 



4. Instead of the carbolic acid emulsion, the following remedy may be 

 used. Incorporate, by mixing well, one pint of carbolic acid in fifty pounds 

 of land plaster, sand or ashes, and sow this mixture on the rows of young 

 carrots, just after thinning. 



An application of one of these four remedies just indicated should be 

 made once a week, during June and July. 



5. Late sowing of the carrot seed is of some advantage and, as that 

 seed may be sown rather late in June and still yield a good crop of table 

 carrots, it is well to make two or three sowings at ten days ' intervals, then 

 we may be sure that at least some parts of the crop will come out clean, 



6. Common sense suggests that carrots should never be sown two con- 

 secutive years on the same piece of ground or near a piece of ground which 

 has just been infested by the carrot-fly. 



7. When carrots are kept in the cellar in sand, during winter, the 

 larvae leave the roots and turn to pupae in the sand. In the spring of the 

 year, this sand should be taken away with great care and buried in a hole 

 at least three feet deep in order to prevent the pupae from emerging. 



