118 FRUIT-GROWING 



every year with a less expensive preparation. 

 The manufacturers are also making the lime 

 sulphur compound in what they call the dry 

 form. This is convenient as it saves weight in 

 shipment. Whether it is as good as the liquid 

 preparation I do not know. I doubt it very 

 much, particularly when the makers claim that 

 one hundred pounds of it are equal to a barrel 

 of the liquid. (A barrel of liquid contains sol- 

 ids to the extent of about one hundred seventy- 

 five pounds.) When diluted at the rate of one 

 to forty the commercial lime sulphur becomes 

 one of our most useful fungicides and forms the 

 basis of most of our summer sprays. In a few 

 cases it is less effective than is Bordeaux 

 Mixture. 



Recently a mixture of barium and sulphur 

 has been offered on the market to take the place 

 of the lime sulphur and it appears to have some 

 advantages over the old preparation. In recent 

 tests it has seemed to offer greater fungicidal 

 value and to produce fruit with a higher fin- 

 ish than could be obtained with either lime sul- 

 phur or Bordeaux. Whether this advantage 

 will remain constant can be determined only by 

 further trial of the material. 



Nicotine sulphate has been mentioned as a 

 contact insecticide for plant lice and other suck- 

 ing insects that may attack trees in summer. 

 It seems the safest preparation to be had for 



