104 



PROF. PARROTT : Not so much that, but you may 

 have soluble arsenic which may burn the foliage and eau3e 

 considerable injury. 



MR. WALKER: Can you tell us whether dusting of 

 apple trees has arrived at any feasible stage? 



PROF. PARROTT : One of the discussions at our recent 

 meeting of the New York State Fruit Growers' Association 

 that aroused a great deal of attention was the report dealing 

 with dusting from the standpoint of the control of insects 

 and plant diseases of the apple orchard. I would say that 

 in the main the problem is yet in the experimental stage, but 

 sufficiently encouraging results have been attained to war- 

 rant a continuation of the work. Some growers are going 

 to use a dust spray for the control of apple scab and the 

 codling moth, using a material composed of 85% of finely 

 divided sulphur and 15% of fluffy arsenate of lead. 



They will probably make two applications, one before 

 and one after blossoming to protect the trees from apple 

 scab and codling moth. From the standpoint of the treat- 

 ment of a commercial apple orchard one great defect of dust 

 spraying is this, that nothing has been devised that will 

 control the San Jose scale, plant lice, red bugs and other 

 insects of that character, so at present our fruit growers 

 have got to use liquid spraying machinery and liquid sprays 

 and what is done along the line of dust spraying should be 

 regarded as supplementary to our usual practices. 



A MEMBPjR: How would you combat the railroad 

 worm ? 



PROF. PARROTT : I am sorry to say that I have had 

 no experience with that pest. One of the remarkable things 

 regarding apple growing in New York is that the control 

 of the railroad worm is not an important question in west- 

 ern New York. In the Hudson River Valley, in occasional 

 years, it does some damage. During 1915 it M^as more 

 injurious than ever before in the 16 years I have been in 

 New York 



Now, those who have Avorked on this problem in New 



