Eradication of Charlock. 



whereas in corn plants, with the parallel or straight venation 

 common in the Graminece, there are no such deep ribs and 

 veins. 



The cost of the dressing is not expensive, the actual 

 solution would not cost more than is. to is. 3d. per acre ; and 

 the ordinary knapsack sprayers can be used by hand, but 

 these do not distribute so evenly as the horse machine. A 

 horse-spraying machine which would do a good many acres 

 in a day can be purchased for about £8. 



The effects of the various experiments made with sulphate 

 of iron appear to differ but little from those obtained with the 

 copper sulphate. A larger quantity of the former must be 

 used, from 10 to 14 per cent., but the cost is not greater* 

 The effect of the sulphate of iron is more quickly seen than 

 that of the sulphate of copper, although the actual result can- 

 not be accurately gauged until after two or three days. 

 On the whole, the consensus of opinion is at present 

 slightly in favour of the sulphate of copper. There is, how- 

 ever, much more to be learned with regard to the whole 

 subject : as to the quantities to be used, the stage of growth of 

 the charlock at which the solutions should be put on, and 

 their effect upon the various crops among whicft the charlock 

 is growing. 



