USEFUL HINTS 113 



mcdy, and if an ounce of paraffin oil is mixed with 

 a gallon of soap-suds with which to drench the 

 cabbages when quite young and before the cater- 

 pillars appear. 



THE CARROT GRUB 



Is a dangerous enemy, and a dressing of soot 

 and lime should be liberally supplied. A good 

 watering with soap-suds all over the soil and round 

 the stems of the plants will keep these pests at bay. 



CELERY FLY 



Hand-picking is generally regarded as the safest 

 remedy, and if every leaf is removed and burnt 

 directly, the mark of the insect can be perceived 

 from the first. It cannot increase to any extent. 

 Syringing the plants vigorously with a mixture of 

 water and paraffin, at the rate of six gallons of the 

 former to a wineglassful of the latter, is an excellent 

 preventive. The oil must be kept well mixed 

 with the water by the frequent use of the syringe 

 in the pail. The operation, to be effectual, must 

 be performed only while the sun is shining, when 

 alone the flies emerge from the feeding-ground in 

 the leaves and proceed at once to lay a fresh batch 

 of eggs. Another good plan is to dust with lime 

 or soot to prevent the grub coming ; but when once 

 the grub appears, it should be crushed by pinching 

 the leaf. This pest causes what looks like blisters 

 on the leaf. 



