LECT. v ENEMIES OF CROPS AND TREES 



75 



thrust through them for withdrawal at intervals of 

 a day or two, numbers of the destructive grubs can 

 be extracted by these baits. 



As a spring dressing against slugs and small grubs, 

 two parts, Ibs. or cwts., of superphosphate of lime, and 

 one part of nitrate of soda, applied at the rate of 

 nearly 2 ozs. to the square yard, or 5 cwt. per acre is 

 excellent, as it stimulates the growth of crops and 

 checks the ravages of their enemies. 



Soot may always be beneficially used for the same 

 object ; and clear lime water applied at night through 



FIG. 16. WIREWORMS. 

 Parent beetle, natural size and enlarged ; larvae attacking potato. 



a rosed can, as if giving the crops a watering, destroys 

 all the slugs that are drenched with it, and they are 

 out feeding at that time. 



Maggots. These infest both the roots and leaves 

 of plants, as in carrots, onions, celery, beet, and 

 others. They are caused by small flies depositing eggs 

 on the plants which hatch, and the larvse small worm- 

 like creatures enter the leaves and roots. 



If in gleamy days in late spring and early summer 

 small flies are seen hovering about the crops, it is an 

 excellent plan to dew them with a solution of soft 



