ANNUAL REPORT, 1934 17 



1931, five in 1932, and three were first grown in 1933. In one case all of the 

 strains were grown on land which was relatively free of black root-rot promoting 

 conditions. In another case all of the strains were grown on land which was 

 favorable to severe development of the disease. Twelve of these new strains were 

 selected for further testing in 1934. 



The production of these twelve new strains and the controls in 1933 was as 

 follows: 



Strains of Grown on land relatively free of Grown on land favorable to 



Havana Seed black root-rot promoting severe development of 



Tobacco conditions black root-rot 



Yields Yield 



per acre Grade Crop per acre Grade Crop 



Pounds index index Pounds index index 



Common strain 2077 .394 818 1445 .352 509 



142A3 2159 .415 896 2012 .383 771 



No. 13 2203 



No. 18 2148 



No. 22 2112 



No. 23 2006 



No. 25 2169 



•s^ No. 27 2128 



No. 29 2379 



No. 30 1895 



No. 31 2345 .411 964 2168 .415 900 



No. 32 2135 .392 838 1947 .411 800 



No. 33 1879 .438 823 1658 .408 676 



No. 34 1933 .418 808 1881 .389 732 



The grade index is a number expressing the grading quality produced by a strain of tobacco 

 under the conditions of the experiment. It is based upon the percentage yield of each grade of 

 tobacco and the relative values of the different grades, which are as follows: 



Light wrappers 1 .00 Long darks (19" and longer) 30 



Medium wrappers 60 Dark stemming (17" and shorter) 20 



Long seconds (19" and longer) .60 Fillers 10 



Short seconds (17" and shorter) ,30 Brokes 10 



The grade index is arrived at by multiplying the percentage yield of each grade by its respective 

 rating given above, and adding the products. The crop index is a number expressing relative 

 crop value. It is derived by multiplying the total production of tobacco in pounds per acre by the 

 grade index value. Grade index and crop index, and the adopted relative values of the different 

 grades of tobacco given above, do not necessarily represent current commercial values and prices. 



All of these new strains of Havana Seed tobacco have proved to be satisfactorily 

 resistant to black root-rot. With respect to type, some of these strains closely 

 resemble certain good strains of common Havana Seed tobacco; and with respect 

 to yield and quality, they almost always surpass the common strains. 



Strains 13, 22, and 29 have proved to be sufficiently promising in small plot 

 tests to justify trial on a considerably larger scale in numerous localities in the 

 Connecticut Valley, in order to determine their worth in practical culture. Strain 

 13 was grown on larger acreage in one locality in 1933 and in this instance proved 

 to be highly satisfactory. Strains 13 and 22 were grown in larger acreages in 

 several localities in 1934. Strain 13 proved to be satisfactory in all cases, and 

 strain 22 in all cases except one. Arrangements have been made for testing 

 strains 13, 22, and 29 on a larger scale in 1935. 



