FIELD STUDIES OP THE CEOWN-GALL OP STJGAE BEETS. 



Table II. — Comparison in sugar content and purity of galled beets with beets not so 



affected — Continued. 



Condition of beets. 



Solids in 



Sugar in 



Coefficient 



juice. 



juice. 



of purity. 



Per cent. 



Per cent. 



Per cent. 



18.80 



16.50 



87.76 



18.32 



15.90 



86.79 



16.42 



13.30 



80.99 



16.62 



13.90 



82.39 



16.50 



13.40 



81.21 



17.72 



14.60 



82.39 



18.70 



15.30 



81.81 



22.12 



18.00 



81.37 



14.87 



13.00 



87.42 



22.97 



19.30 



84.02 



19.07 



15.20 



79.70 



16.07 



13.60 



84.62 



17.01 



13.85 



81.35 



19.66 



16.21 



82.15 



Sugar in 

 the beet. 



Test No. 21: 



Galled.. 



No galls 

 Test No. 22: 



Galled.. 



No galls 

 Test No. 23: 



Galled.. 



No galls 

 Test No. 24: 



Galled.. 



No galls 

 Test No. 25: 



Galled.. 



No galls 

 Test No. 26: 



Galled.. 



No galls 

 Average: 



Galled.. 



No galls 



Per cent. 

 16.30 

 15.2ft 



12. 6ft 

 12. 40: 



11.70 

 13.90 



14.20 



16.70 



12.20 

 17.60 



13.90 

 12.50 



12.54 

 15.18 



A study of Table II indicates that gall formations on sugar beets 

 have a tendency to reduce both the sugar content and the purity 

 of the roots. The effect upon the sugar content seems to be more 

 marked than upon the purity. Everyone who has studied the indi- 

 viduality of the sugar beet knows that there is a difference in the 

 sugar content and purity of healthy beets growing side by side in 

 the same row. It is not surprising, therefore, that an occasional 

 pair shows qualities favorable to the galled beets, as in tests Nos. 

 10 and 21 of Table II. It is safe to say, however, that in the great 

 majority of cases the formation of galls upon the roots of sugar beets 

 has a decidedly injurious effect upon either the purity or the sugar 

 content or upon both these factors of quality hi the beet root. 



It seems to be practically impossible to obtain any accurate data 

 regarding the effect of galls upon the size of the roots affected. We 

 find the largest as well as the smallest beets more or less seriously 

 infested with galls, as shown in Plate I, A to E, and it is impossible 

 to know whether the galled beets would have been larger or smaller 

 if they had been free from galls. In some infested areas the larger 

 beets are more generally galled, while in other infested areas the 

 smaller beets are the ones most generally affected; and since the 

 individuality of the beet embraces the size and shape, as well as the 

 quality of the roots, a satisfactory comparison of the weights of the 

 galled and not galled beets has not been practicable in any of the 

 areas that have come under the observation of the writer. So far 

 as one can judge from general field observations, however, the galls 

 do not seem to have any marked effect upon the size of the beets. 

 Consequently the tonnage or yield of beets per acre does not seem 

 to be appreciably affected by the disease except in those cases in which 

 the galls cause the beet roots to decay. 



