74 STATE HORTICULTURAL SOCIETY. 



harvest and this past summer it was not uncommon for whole cars of 

 sour cherries to go down before reaching their destination and some 

 treatment such as here described might have helped. 



SUMMARY. 



This report may be briefly summarized in this way: 

 ■ 1st. The pear grower has the choice of two methods of control for 

 pear psylla, one of which is a dormant application for the hibernating 

 adults and the other an application directed at the eggs just before 

 blossoming. Either of these applications should be followed by one of 

 nicotine sulphate after blossoming and one essential point to be kept in 

 mind is that all spraying for pear psj'lla should bo done very thoroughly. 



2nd. Grape dusting has not given conclusive results regarding rot 

 control because of the lack of an epidemic of rot. Nictoine dusts give 

 promise of being successful against grape leaf hoppers but no recom- 

 mendation is made at this time, 



3rd. The work with anthracnose control indicates that the number 

 of applications may be safelj' reduced but again definite recommenda- 

 tions are postponed. 



4th. Further work will be necessary before any definite statement 

 can be made concerning leaf spot control on plums. With cherries we 

 have had one year of success with dust and one not so successful but 

 with indications that if properly applied, it may be satisfactory. 



5th. There is little doubt that a prc-pink application on apples will 

 be very desirable for the control of scab, particularly with susceptible 

 varieties. 



6th. The work with cheaper forms of dust and with spreaders in 

 spraying materials must be continued before any conclusive statements 

 can be made. 



7th. General comparative tests of dust and standard sprays this 

 year on apples and pears have shown about equal control of scab but 

 spraying usually gave better control of codling moth. 



8th. The use of paradichlorobenzene must still be considered in the 

 experimental stage but it may well be used with certain restrictions. 



9th. The holding and shipping quality of peaches and plums was 

 greatly improved by a late application of sulphur dust. 



CONCLUSIONS. 



In conclusion I wish to say that I do not care to advise any grower 

 that he should dust rather than spray or vice versa, but am giving the 

 results of our experiments and observations so that he may use them for 

 what they are worth in making his own decisions. I may say that I 

 think dusting is here to stay and has a definite place in orchard practice 

 but just how much and for what it shall be used as a general practice 

 is for each grower to decide according to his own conditions and needs 



DISCUSSION. 



Mr. Hutchins: Would it make any difference in the season of condi- 

 tions in applying pre-pink spray? 



Mr. Button: When pre-pink condition comes along you must know 

 how long it is going to be before the blossoms would be in the pink. 



