ii6 



Journal of Agricultural Research 



Vol. XII, No. 3 



Table III. — Percentage of bitter-pit on Grimes apples in storage. November g, igis 



Plot 

 No. 



Irrigation treatment. 



Total 

 num- 

 ber 

 of 

 apples. 



Percentage of 

 apples of the 

 following sizes. 



Larger 

 than 



inches. 



2Vi 



inches 



and 

 smaller. 



Percentage of apples 

 that developed bitter- 

 pit from Sept. 29 to 

 Nov. 9. 



Apples 



larger 



than 



2^ 



inches. 



Apples 



inches 



and 

 smaller. 



Total. 



Total 

 per- 

 cent- 

 age 

 of 

 bitter- 

 pit 

 de- 

 vel- 

 oped 

 by 

 Nov. 



Heavy 



Medium 



Light 



Medium till Aug. 24, then 

 heavy 



132 

 166 

 106 



72 



92. 2 

 83.0 



08.6 



18. 2 



7.8 



17. o 



1.4 



63- 9 

 48.4 



33-7 

 63-4 



4.2 

 . o 



II. o 



79 

 59 



52 



62. 5 



P£P CENT OF Brrrep-PJT 



\ PEO CENT or B/rrEQ-Pir om s£pr. 29. 



\p£»,CENr OF Birrc/f-piT dcvclopfo bcfween S£Pr.39ANO nov.s. 



\P£a CE/VT OF BITTEQ-PIT DEVELOPED BFTWEEr^ N0V.3 AND UAN.^*. 



Fig. 3.— Diagram showing the amount of bitter-pit on Grimes apples in 1915. The black portions of 

 the bars indicate the percentage of apples affected with bitter-pit one week after picking; the shaded por- 

 tions, the amount developed between September 29 and November 9; and the white portion, the amount 

 between November 9 and January 4. All of the percentages are based on the number of apples at the 

 beginning of the experiment. See figure 2 for soil-moisture conditions. 



A study of Table III shows that nearly all of the bitter-pit occurred 

 on the apples that were larger than 2^ inches. The percentages in 

 the next to the last column show that the contrasts in bitter-pit on 

 the stored samples were similar to those found a week after picking, 

 and indicate the importance of orchard conditions in determining the 

 susceptibility of the fruit in storage. These percentages are estimated 

 on the basis of the sound apples left on September 29. If the original 

 number of apples were taken as a base in estimating percentages, these 

 contrasts would partially disappear, as is shown in figure 3; but this 

 would be an unfair comparison, so far as determining behavior in 

 storage is concerned, as a large number of the apples had already been 

 eliminated from the experiment. The last column in Table III shows 

 the total amount of bitter-pit to November 9, estimated on the basis of 

 the original number of apples. 



The sound fruit from the above experiment was returned to cellar 

 storage and a third set of notes taken on January 4, the fruit being cut 

 open at this time to determine the amount of internal streaking or 

 browning. But very few specimens of bitter-pit were found, and these 

 gave but little contrast between the fruit from the diflferent irrigation 

 plats. 



