462 



STATE BOARD OF AGRICULTURE. 



TABLE 12. HOLDING TEST OF MONARCH PLUMS^ 1921. 



The Grand Dukes were held at Hart for examination but the Monarchs 

 were shipped to East Lansing and were accidentally placed in cold storage 

 with some other fruit and were not removed for three days. This accounts 

 for the longer period between the time they were picked and when they began 

 to decay. 



Wark Peaches. Wark is an early ripening peach which, like some other 

 varieties ripening at the same season, is very susceptible to brown rot. Mr. 

 Hawley has usually experienced difficulty in handling these peaches as they 

 would be picked, apparently in good condition, but would rot so quickly 

 that he was frequently unable to get them shipped before they had badly 

 decayed. The orchard contains about two hundred trees and was divided 

 into three plots. 



1. Check plot. No treatment. It contained two rows of ten trees each. 



2. Dusted. One application, July 28. This plot was made up of about 

 50 trees. 



3. Dusted. Tfo applications. July 5 and July 28, This plot contained 

 about 130 trees. 



The trees were dusted at each application from two directions using about 

 % pound of material per tree. This orchard had no summer application of 

 either dusting or spraying materials. The dust used contained 85 per cent 

 dusting sulphur, 15 per cent hydrated lime. 



RESULTS. 



Control of brown rot before harvest. Careful observations were made by 

 Mr. Monroe Hawley when the fruit was picked. The fruit on all the trees 

 in both dusted plots was practically free from brown rot at this time, but 

 on the check trees there was a small but noticeable amount of it. The 

 development of brown rot on the trees was probably greatly retarded by 

 the dry weather which had prevailed in this district nearly all summer. 



Control of brown rot after harvest. When the fruit was picked average 

 samples were taken from each plot, packed and shipped to East Lansing and 

 examined at intervals with the results shown in table 13. 



