168 THE CONNECTICUT POMOLOGICAL SOCIETY. 



quite as effective against scab as the boiled wash. Our ex- 

 periments show that it will control mild cases of scab and 

 will entirely prevent leaf-spot, "fruit-spot," and the sooty 

 fungus, but in sections where scab is a serious disease this 

 wash would probably be inefficient. In the Shenandoah Val- 

 ley of Virginia, where scab rarely occurs except in a mild 

 form and under similar conditions elsewhere, the self -boiled 

 lime-sulphur would perhaps be preferable to either the 

 boiled wash or Bordeaux. 



Arsenate of lead is unquestionably the poison to use 

 with the lime-sulphur mixtures. Instead of increasing the 

 poisonous properties of the mixture, as at first feared, it ap- 

 parently has the opposite effect to some extent and does not 

 lose any of its insecticidal value by reason of the combination. 

 In Connecticut orchards it would probably be safe to use 

 the commercial lime-sulphur solution at the rate of 1^4 gal- 

 lons to 50 gallons of water with 2 lbs. of arsenate of lead. 



The trees should be sprayed (1) Just before they bloom, 

 after the cluster buds open, (2) As soon as the petals fall, 

 and (3) Three to four weeks later. If properly carried out 

 this should give good protection against scab, leaf-spot and 

 codling moth. On some bad scabbing varieties a fourth ap- 

 plication about nine weeks after the petals fall might be 

 necessary for protection against late infections. 



Following this paper Prof. Scott showed a series of lan- 

 tern slides illustrating the control of apple and peach dis- 

 eases with lime-sulphur mixtures. The following is a sum- 

 mary of his remarks on the spraying of peach orchards, with 

 self-boiled lime-sulphur for the control of scab and brown- 

 rot. 



Self-Boiled Lime-Sulphur for the Control of Peach Scab and 



Brown Rot. 



Experiments conducted by the speaker in the Hale or- 

 chard at Fort Valley, Georgia, during 1909 showed that the 



